Phantom Menace To Dark Matter Theory

Image: The answer to the riddle of dark matter could be found in our own solar system (Image: NASA)

From New Scientist:

A SUBTLE anomaly in the orbit of the planets in our solar system could prove a controversial idea that goes beyond Einstein.

The orbit of the innermost planet, Mercury, departs from what it should be under Newton's laws. A century ago, when Einstein explained this anomaly, it confirmed his theory of gravity - the general theory of relativity.

Now an Israeli physicist predicts that a similar but far more subtle anomaly in the orbits of the planets, if detected, might prove his own theory, known as modified Newtonian dynamics, or MOND. This provides an alternative theory to dark matter to explain why stars orbiting at the edge of spiral galaxies are not flung out into space. These stars are travelling at speeds too fast for conventional gravity from the mass at the heart of a spiral galaxy to hold them in their orbits, so something else must be keeping them on track.

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New Wonder Material, One-Atom Thick, Has Scientists Abuzz

Graphene has been described as a carbon nanotube unrolled. Its two-dimensional sheet is made up of a single layer of carbon atoms arranged in a hexagonal pattern like a honeycomb. Electrons can move ballistically through these sheets even at room temperature, making graphene a prime target of the electronics industry. image from Science@Berkeley Lab

From McClatchy News/Yahoo News:

WASHINGTON — Imagine a carbon sheet that's only one atom thick but is stronger than diamond and conducts electricity 100 times faster than the silicon in computer chips.

That's graphene, the latest wonder material coming out of science laboratories around the world. It's creating tremendous buzz among physicists, chemists and electronic engineers.

"It is the thinnest known material in the universe, and the strongest ever measured," Andre Geim , a physicist at the University of Manchester, England , wrote in the June 19 issue of the journal Science.

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Rubik Cube Inventor Devises New Puzzle To Drive Us All To Distraction

From Times Online:

His cube was one of the most popular and infuriating toys of all time. Now Professor Ernö Rubik is hoping that the sphere will bring sleepless nights to the world’s obsessive puzzlers.

The creator of Rubik’s Cube is back with his first new puzzle for almost 20 years and early indications are that it is going to be every bit as irritating as the original.

Rubik’s 360, which goes on sale next week, features six small balls inside three interlocking spheres. The task is to lock each ball into colour-coded capsules on the outermost sphere. Professor Rubik said of his cube that it was “easy to understand the task, but hard to work out the solution”. It is just as aggravating to crack the 360.

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What Does a Drug That Extends Life In Mice Mean For Humans?

Getty Images

From Time Magazine:

A natural compound, used as an immunosuppressant in organ-transplant patients, has been found to extend life in mice, according to a study published Wednesday by the journal Nature. Aging mice that were given the substance, rapamycin, lived significantly longer than mice that didn't get the drug: females that received rapamycin were 13% older at death, and males 9% older.

The research, conducted as part of the National Institute of Aging Interventions Testing Program, took place at three separate test sites and involved nearly 2,000 genetically similar mice. Trials began when mice were about 600 days old — well into middle age, at a stage roughly equivalent to 60-year-old humans.

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Update: Secret to a longer life lies on Easter Island -- The Independent

Finding Fear: Neuroscientists Locate Where It Is Stored In The Brain

For the first time, neuroscientists have located the neurons responsible for fear conditioning in the mammalian brain. (Credit: iStockphoto/Kurt Paris)

From Science Daily:

ScienceDaily (July 8, 2009) — Fear is a powerful emotion, and neuroscientists have for the first time located the neurons responsible for fear conditioning in the mammalian brain. Fear conditioning is a form of Pavlovian, or associative, learning and is considered to be a model system for understanding human phobias, post-traumatic stress disorder and other anxiety disorders.

Using an imaging technique that enabled them to trace the process of neural activation in the brains of rats, University of Washington researchers have pinpointed the basolateral nucleus in the region of the brain called the of amygdala as the place where fear conditioning is encoded.

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My Comment: Inhibit the fear .... you will have the ultimate soldier.

Laughter: Not Just For Funny Stuff

Laughter comes in two main types, scientists found. Credit: Dreamstime

From Live Science:

Scientists say there are two types of laughter: the kind that comes from pure glee, and the kind that's meant to send a social message. New research suggests autistic children don't often express the latter type, a finding that could reveal more about the nature of human laughter.

Laughter probably predates human speech by millions of years, scientists think. It likely evolved as an early form of communication to help people negotiate group dynamics and establish hierarchy, said William Hudenko, a psychologist at Ithaca College who led the new study.

Babies usually learn to laugh before they learn to speak.

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Europe Targets Manned Spaceship

From The BBC:

Europe has taken the first step towards building its own manned spaceship.

The European Space Agency has asked industry to work out the requirements of the craft and its likely cost.

Known as the Advanced Re-Entry Vehicle, it would be developed in phases - first as an unmanned vessel to carry cargo, and then as an astronaut crew ship.

At the moment, Europe has no independent capability to transport humans into space and must hitch rides on American or Russian systems.

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Google Announces PC Operating System To Compete With Windows

From Epicenter/Wired:

Google is releasing a lightweight, open-source PC-operating system later this year, the company announced Tuesday night, a move that threatens the very heart of Microsoft, long seen as Google’s biggest rival.

Chrome OS is intended to be a very lightweight, quick-starting operating system whose central focus is supporting Google’s Chrome browser. Applications will run mostly inside the browser, making the web — not the desktop — into the computer’s default operating system.

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Was Ancient Earth A Green Planet?

From The New Scientist:

Earth's landmasses in the late Precambrian probably weren't pleasant, but at least they were green. A new analysis of limestone rocks laid down between 1 billion and 500 million years ago suggests that there was extensive plant life on land much earlier than previously thought.

The plants were only tiny mosses and liverworts, but they would have had a profound effect on the planet. They turned the hitherto barren Earth green, created the first soils and pumped oxygen into the atmosphere, laying the foundations for animals to evolve in the Cambrian explosion that started 542 million years ago.

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Scientists Create 'Artificial Brain Cell'

From The Telegraph:

Scientists have created an artificial brain cell they believe could one day be used to treat devastating neurological diseases.

The team has managed to pass messages within the mind in the same way as nerve cells, using a tiny piece of plastic which can transmit electricity.

These messages are used by the brain to control many actions in the body.

Correcting when they go awry could be the key to treating some diseases like Parkinson's disease researchers believe.

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Archaeologists Dive Deep Into The Lost World Of The Maya

From USA Today:

CARA BLANCA, Belize — Machete chops echo and leaves rustle underfoot when the vines clear, revealing cobalt-blue water in a cliff-sided pool.

Hidden beneath the dry-season forest, these waters, the blue cenotes (cen-NO-tays) of Cara Blanca, represent a mystery for scholars, one left by the ancient Maya. What lies within these sacred wells?

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My Comment: A compelling and a must read on Mayan history.

Human Sperm Created From Stem Cells In World First, Claims British University

From The Telegraph:

British scientists have created human sperm using stem cells in a medical first that could revolutionise fertility treatment, they claim.

Researchers at the pioneering Northeast England Stem Cell Institute say they have made the breakthrough using stem cells from an embryo.

They claim that with some minor changes the sperm could theoretically fertilise an egg to create a child.

Within 10 years, the scientists say the technique could also be used to allow infertile couples to have children that are genetically their own. It could even be possible to create sperm from female stem cells, they say, which would ultimately mean a woman having a baby without a man.

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New Evidence That Vinegar May Be Natural Fat-fighter

Found in many salad dressings, pickles, and other foods, vinegar could help prevent accumulation of body fat and weight gain, scientists report. (Credit: Wikimedia Commons)

From Science Daily:

ScienceDaily (July 7, 2009) — Researchers in Japan are reporting new evidence that the ordinary vinegar — a staple in oil-and-vinegar salad dressings, pickles, and other foods — may live up to its age-old reputation in folk medicine as a health promoter. They are reporting new evidence that vinegar can help prevent accumulation of body fat and weight gain.

Tomoo Kondo and colleagues note in the new study that vinegar has also been used as a folk medicine since ancient times. People have used it for a range of ills. Modern scientific research suggests that acetic acid, the main component of vinegar, may help control blood pressure, blood sugar levels, and fat accumulation.

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Humans Ate Fish 40,000 Years Ago

Chinese fishermen haul in the catch of fish from the frozen Chagan Lake in Songyuan, northeast China's Jilin province on December 25, 2008, at the start of the winter fishing season. Chagan Lake covers an area of 259 square kilometers and is one of the 10 largest freshwater lakes in China, where each winter, fishermen use the ancient method of breaking the ice with wooden stakes before placing their nets to harvest the fish. Getty Images

From Live Science:

At least one of our ancestors regularly ate fish 40,000 years ago, a new study finds.

Scientists analyzed chemical compositions of the protein collagen in an ancient human skeleton from Tianyuan Cave near Beijing to reach their conclusion.

Fishing at this time must have involved considerable effort, the researchers think, because fossil records suggest humans were not using sophisticated tools — beyond crude stone blades — until about 50,000 years ago.

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Ray Kurzweil on How to Combat Aging

From Technology Review:

The noted futurist says that exponential advances will allow us to intervene in the aging process.

Submitted in response to Technology Review's interview with Leonard Hayflick. See "Can Aging Be Solved?"

Entropy is not the most fruitful perspective from which to view aging. There are varying error rates in biological information processes depending on the cell type, and this is part of biology's paradigm. We have means already of determining error-free DNA sequences even though specific cells will contain DNA errors, and we will be in a position to correct those errors that matter.

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Stephen Hawking: "Humans Have Entered A New Stage Of Evolution"

From The Daily Galaxy:

Although It has taken homo sapiens several million years to evolve from the apes, the useful information in our DNA, has probably changed by only a few million bits. So the rate of biological evolution in humans, Stephen Hawking points out in his Life in the Universe lecture, is about a bit a year.

"By contrast," Hawking says, "there are about 50,000 new books published in the English language each year, containing of the order of a hundred billion bits of information. Of course, the great majority of this information is garbage, and no use to any form of life. But, even so, the rate at which useful information can be added is millions, if not billions, higher than with DNA."

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Coffee 'May Reverse Alzheimer's'

From The BBC:

Drinking five cups of coffee a day could reverse memory problems seen in Alzheimer's disease, US scientists say.

The Florida research, carried out on mice, also suggested caffeine hampered the production of the protein plaques which are the hallmark of the disease.

Previous research has also suggested a protective effect from caffeine.

But British experts said the Journal of Alzheimer's disease study did not mean that dementia patients should start using caffeine supplements.

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Buzz Aldrin: Why We Should Leave The Moon Alone And Settle Mars Instead

Photo: Buzz Aldrin is pictured standing on the moon,
which Neil Armstrong can be seen reflected in his visor.

From The Daily Mail:

Nasa astronaut Buzz Aldrin, the second man to walk on the Moon, has urged the world to forget about returning to our nearest satellite and head to Mars instead.

'Why do we want to go to go back to the Moon?' he asked.

'Some nations want to go for prestige to say they are 'first' in space exploration in the 21st century and they want Nasa to compete with them.

'But there's no reason for us to go back. We can look at the effects of long-term missions in space by flying around comets, rather than setting up a base on the Moon. We're not going to launch any missions from there.'

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Reasons Not to Panic Over a Painkiller

From The New York Times:

Few drugs are more ubiquitous than acetaminophen, the pain reliever found in numerous over-the-counter cold remedies and the headache drug Tylenol.

But last week, a federal advisory committee raised concerns about liver damage that can occur with overuse of acetaminophen, and the panel even recommended that the Food and Drug Administration ban two popular prescription drugs, Vicodin and Percocet, because they contain it.

The news left many consumers confused and alarmed. Could regular use of acetaminophen for pain relief put them at risk for long-term liver damage?

To help resolve the confusion, here are some questions and answers about acetaminophen.

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How Can YouTube Survive?

Brand of the free: Founder Jawed Karim appeared in the first video, of elephants at a zoo

From The Independent:

It's wildly popular - and thought to be losing hundreds of millions of dollars a year. Now questions are being asked about the future of YouTube. Rhodri Marsden investigates a mystery of digital-age 'freeconomics'

It must surely rank as the most mundane business launch in history. Jawed Karim, one of the founders of YouTube, shuffles timidly in front of a video camera while standing in front of a group of elephants at San Diego zoo, with precious little idea of what he was starting. "The cool thing about these guys," he says, nervously gesturing behind him, "is that they have really long trunks. And that's pretty much all there is to say."

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Caffeine Reverses Memory Impairment In Mice With Alzheimer's Symptoms

Coffee drinkers may have another reason to pour that extra cup. When aged mice bred to develop symptoms of Alzheimer's disease were given caffeine -- the equivalent of five cups of coffee a day -- their memory impairment was reversed. (Credit: iStockphoto/Royce DeGrie)

From Science Daily:

ScienceDaily (July 6, 2009) — Coffee drinkers may have another reason to pour that extra cup. When aged mice bred to develop symptoms of Alzheimer's disease were given caffeine – the equivalent of five cups of coffee a day – their memory impairment was reversed, report University of South Florida researchers at the Florida Alzheimer's Disease Research Center.

Back-to-back studies published online July 6 in the Journal of Alzheimer's Disease, show caffeine significantly decreased abnormal levels of the protein linked to Alzheimer's disease, both in the brains and in the blood of mice exhibiting symptoms of the disease. Both studies build upon previous research by the Florida ADRC group showing that caffeine in early adulthood prevented the onset of memory problems in mice bred to develop Alzheimer's symptoms in old age.

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How Global Catastrophe Could Make Us Smarter

From Live Science:

When supervolcanoes blow their tops, the world's climate is altered and life is snuffed out regionally and challenged globally. Such an event is thought to have occurred 74,000 years ago when the Toba supervolcano erupted in what is now Sumatra with a force estimated to be 1,000 to 10,000 times that of Mount St. Helens.

The timing of Toba's tempest fits with an interesting bottleneck known to exist in human evolution, as seen in DNA evidence. The population became very small sometime between 90,000 and 60,000 years ago. And a new idea floating around suggests that the eruption may have contributed — by necessity — to our supreme intelligence today. Further, it has been suggested, we may be undergoing the next great leap in smarts right now.

More on all that lower down. First, some fresh research on the eruption:

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Coming Soon: Photographic Memory In A Pill?

RGS-14: Will you remember what this protein looks like 2 months from now?

From Popsci.com:

Scientists isolate a protein that significantly increases visual recall.

Wish you had a photographic memory? Well, Encyclopedia Brown, drugs may amp your brain up to that point soon. A group of Spanish scientists claim to have singled out a protein that can extend the life of visual memory significantly. When the production of the protein was boosted in mice, the rodents' visual memory retention increased, from about an hour to almost 2 months.

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Who is Neil Armstrong?

Neil Armstrong

From The BBC:

A hero to millions, Neil Armstrong has consistently shunned the limelight. To mark the 40th anniversary of the first manned Moon landing, author Andrew Smith travelled across America to discover why the man who first set foot upon the Moon remains such an enigma.

His words on being the first person ever to set foot on the Moon have been written into soundbite history - but in the four decades since Neil Armstrong became a household name, he has also increasingly become an enigma.

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July 4, 1776: Preserving the Declaration

From Wired:

1776: The Declaration of Independence is signed. It will take 127 years before someone gets around to saying, “Hey, maybe we should preserve this thing.”

The Declaration of Independence can be fairly said to stand alongside the Magna Carta and Bill of Rights as the most important documents in the history of democracy. Its significance was understood from the moment it was signed, so one is left to wonder why its preservation was ignored for so long.

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'The Eagle Has Landed': A Space Geek Remembers The Moon Shot

Fly me to the Moon: the Apollo 11 ahead of lift-off on 16 July 1969. Getty

From The Independent:

As a 10-year-old 'space geek', Paul Rodgers was glued to the television when Neil Armstrong uttered the immortal words, 'The Eagle has landed.' Forty years on, he looks back at mankind's giant leap – and the Cold War politics that turned the space race into a mad dash

The first sign of trouble came when the Eagle was five minutes into its descent, 33,500ft above the Moon's surface. A shrill alarm rang through the cramped, seatless cabin in which two astronauts stood facing the stars. An error message flashed up on their primitive computer's tiny read-out: "1202". Neither Neil Armstrong nor Buzz Aldrin knew what it meant. It was left to Steve Bales, a 26-year-old technician at Mission Control in Houston to decide they should keep going. The error, he was fairly sure, would fix itself, and he repeatedly called "Go!" as the alarm sounded four more times.

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'Greedy' Trees Still Leave Room For The Little Plants

From New Scientist:

While they might hog the bulk of the resources, trees still leave enough "crumbs" for smaller neighbouring plants to eke out a living, researchers say. The finding contradicts previous notions of plant competition and adds support to a new view of how a plant's size affects the survival and composition of its neighbouring species.

Previously, it was assumed that trees and other large plants monopolized sunlight, water, and other available resources, limiting the number of smaller plant species that can coexist in their vicinity. Research in greenhouse settings supported this view.

Now a study of forests in southern British Columbia shows that larger plants do not always correlate with fewer species in an area.

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World's Oldest Bible Goes Online 1,600 Years After It Was Penned On Parchment

Reunited: Pages of the world's oldest surviving Christian Bible, the Codex Sinaiticus have been brought together for the first time online

From The Daily Mail:

Over 800 pages of the earliest surviving Christian Bible have been recovered and made available on the internet.

More than half of the 1,600-year-old Codex Sinaiticus manuscript has been pieced together in a joint effort between institutions in the UK, Germany, Egypt and Russia.

Now high-resolution digital images of the recovered pages of the 4th century book - written in Greek on parchment leaves - have been made available at www.codexsinaiticus.org.

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Paralyzed People Using Computers, Amputees Controlling Bionic Limbs, With Microelectrodes On (Not In) Brain

Photo: Microwires emerging from the green and orange tubes connect to two arrays of 16 microelectrodes. Each array is embedded in a small mat of clear, rubbery silicone. The mats are barely visible in this image. These microelectrode arrays sit on the brain without penetrating it, a step toward longer-lived, less invasive versions of "neural interfaces" that in recent experiments elsewhere have allowed paralyzed people to control a computer cursor with their thoughts. The new microeletrode arrays were placed in two patients at the University of Utah who already were undergoing brain surgery for severe epilepsy. The larger, numbered, metallic electrodes are used to locate the source of epileptic seizures in the brain, so the patients allowed the micoelectrodes to be placed on their brains at the same time. (Credit: University of Utah Department of Neurosurgery)

From Science Daily:

ScienceDaily (July 6, 2009) — Experimental devices that read brain signals have helped paralyzed people use computers and may let amputees control bionic limbs. But existing devices use tiny electrodes that poke into the brain. Now, a University of Utah study shows that brain signals controlling arm movements can be detected accurately using new microelectrodes that sit on the brain but don't penetrate it.

"The unique thing about this technology is that it provides lots of information out of the brain without having to put the electrodes into the brain," says Bradley Greger, an assistant professor of bioengineering and coauthor of the study. "That lets neurosurgeons put this device under the skull but over brain areas where it would be risky to place penetrating electrodes: areas that control speech, memory and other cognitive functions."

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Tropical Rainfall Moving North

The band of heavy precipitation indicates the intertropical convergence zone. The new findings are based on sediment cores from lakes and lagoons on Palau, Washington, Christmas and Galapagos islands. Credit: University of Washington

From Live Science:

Earth's most prominent rain band, near the equator, has been moving north at an average rate of almost a mile (1.4 km) a year for three centuries, likely because of a warming world, scientists say.

The band supplies fresh water to almost a billion people and affects climate elsewhere.

If the migration continues, some Pacific islands near the equator that today enjoy abundant rainfall may be starved of freshwater by midcentury or sooner, researchers report in the July issue of the journal Nature Geoscience.

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How Trivial DNA Changes Can Hurt Health

From Scientific American:

Small changes to DNA that were once considered innocuous enough to be ignored are proving to be important in human diseases, evolution and biotechnology.

Biologists long thought they understood how genetic mutations cause disease. But recent work has revealed an important twist in the tale and uncovered surprising—even counterintuitive—ways that alterations in DNA can make people sick. The classic view assumed that what are termed “silent” mutations were inconsequential to health, because such changes in DNA would not alter the composition of the proteins encoded by genes. Proteins function in virtually every process carried out by cells, from catalyzing biochemical reactions to recognizing foreign invaders. Hence, the thinking went, if a protein’s makeup ends up being correct, any small glitches in the process leading to its construction could not do a body harm.

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High Levels Of Cycling Training Damage Triathletes' Sperm

From Brightsurf:

Amsterdam, The Netherlands: The high-intensity training undertaken by triathletes has a significant impact on the quality of their sperm, the 25th annual conference of the European Society of Human Reproduction and Embryology heard today (Monday 29 June). Professor Diana Vaamonde, from the University of Cordoba Medical School, Cordoba, Spain, said that the triathletes who did the most cycling training had the worst sperm morphology.

Professor Vaamonde's team has previously shown that both high exercise intensity and high exercise volume may be detrimental to sperm quality. They decided to take a more profound look at the sportsmen who seemed to show the greatest alteration - the triathletes - and assess the correlation between the volume of training in each activity and sperm quality. Of the three modalities, only cycling, the activity for which triathletes undertake the most training, showed a clear correlation with sperm quality. The more cycling training the sportsmen undertook, both in time and kilometres, the worse their sperm quality became.

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From Haiti, A Surprise: Good News About AIDS

In this May 7, 2009 photo, patients with HIV/AIDS wait to be attended at the Partners in Health hospital in Cange, in central Haiti. Haitian infection rates dropped from 6.2 percent to 3.1 percent among expectant mothers in the last 15 years. Researchers recently switched to a new methodology that tests all adults, which puts Haiti's official rate at 2.2 percent, according to UNAIDS. (AP Photo/Ramon Espinosa)

From Yahoo News/AP:

BLANCHARD, Haiti – When Micheline Leon was diagnosed with HIV, her parents told her they would fit her for a coffin.

Fifteen years later, she walks around her two-room concrete house on Haiti's central plateau, watching her four children play under the plantain trees. She looks healthy, her belly amply filling a gray, secondhand T-shirt. Her three sons and one daughter were born after she was diagnosed. None has the virus.

"I'm not sick," she explained patiently on a recent afternoon. "People call me sick but I'm not. I'm infected."

In many ways the 35-year-old mother's story is Haiti's too. In the early 1980s, when the strange and terrifying disease showed up in the U.S. among migrants who had escaped Haiti's dictatorship, experts thought it could wipe out a third of the country's population.

Instead, Haiti's HIV infection rate stayed in the single digits, then plummeted.

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Why You Can’t Keep Your Foot Out of Your Mouth

From Wired:

It’s one of the more frustrating aspects of human nature: The harder we try not to say or do or think something, the more likely we are to slip — and often at the worst possible time. But maybe science can help.

More than a decade after the inability of a Dostoevsky protagonist to stop thinking about a white bear inspired his first experiments, Harvard University psychologist Daniel Wegner has become one of the world’s foremost experts on what are now known as ironic processes.

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Can American Farms Make Bamboo the Next Big Cash Crop?

Could bamboo forests like these revive Mississippi Delta agriculture? (Photograph by David Sanger/Getty Images

From Popular Mechanics:

Bamboo has come into vogue as a green, sustainable resource that's used for everything from cutting boards to clothing to wood floors. But until now, almost all of the bamboo in products sold here has come from overseas. That could change soon, as new planting techniques may lead to millions of new acres of bamboo shoots in the American South.

Could the Mississippi Delta become America's bamboo belt, the breadbasket of a new class of homegrown structural building components? Earlier this June in Greenville, Miss., a group of engineers, manufacturers, bureaucrats and farmers gathered to discuss how land formerly cultivated for cotton might be converted to produce bamboo on a massive scale. Teragren, the world's largest bamboo building products manufacturer, has engineered new structural joists made of imported Moso, a bamboo species with the tensile strength of steel. Teragren VP Tom Goodham says a domestic Moso source is the key to renewable structural timber becoming mainstream and affordable: "The whole bamboo building-products category is just on the cusp of critical mass."

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NASA Reconsiders Its Moon Plans

Ares Rocket : courtesy of NASA

From Popscicom:

The Constellation system, which includes the Ares rocket and Orion crew module, could lose favor to a cheaper, more DIY approach to launching orbital craft post-Space Shuttle.

Next year, 33 years after its maiden flight, the space shuttle will retire. What happens after that has become subject to fierce debate within the space agency. The designated successor program, named Constellation, was the darling of previous NASA administrator Michael Griffin, but a new review now has the space agency looking elsewhere for a ride back into the firmament.

The centerpiece of the Constellation program was the Ares rocket. However, that rocket needs billions of dollars more in funding to reach operational status, and has been plagued by numerous engineering problems. Now, some are proposing an alternative rocket system that makes use of already existing shuttle parts.

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Late Blight -- Irish Potato Famine Fungus -- Attacks U.S. Northeast Gardens And Farms Hard

Leaf lesions due to late blight.
(Credit: Copyright College of Agriculture and Life Sciences, Cornell University)

From Science Daily:

ScienceDaily (July 5, 2009) — Home gardeners beware: This year, late blight -- a destructive infectious disease that caused the Irish potato famine in the 1840s -- is killing tomato and potato plants in gardens and on commercial farms in the eastern United States. In addition, basil downy mildew is affecting plants in the Northeast.

"Late blight has never occurred this early and this widespread in the U.S," said Meg McGrath, associate professor of plant pathology and plant-microbe biology.

One of the most visible early symptoms of the disease is brown spots (lesions) on stems. They begin small and firm, then quickly enlarge, with white fungal growth developing under moist conditions that leads to a soft rot collapsing the stem.

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Even Cockroaches Get Fat On Bad Food

Gromphadorhina portentosa--the Madagascar hissing cockroach.
Credit: Natural History Museum, London

From Live Science:

Cockroaches may be tiny enough to slip through the smallest of cracks, but just like humans, these eternal pests can get fat on an unhealthy diet.

As part of a decade's worth of research on cockroaches, Patricia Moore of the University of Exeter studied how female cockroaches change their mating behavior in response to their diet, specifically what they eat when they are young.

"We already knew that what they eat as adults influences reproductive decisions," Moore said. But just how the food they consumed early in life shaped these decisions wasn't known.

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Can Aging Be Solved?

Credit: UCSF

From Technology Review:

At the World Congress of Gerontology and Geriatrics later this week in Paris, amid sessions on Alzheimer's disease, elderly care, and osteoporosis is a session provocatively titled "Ageing Is No Longer an Unsolved Biological Problem." It's organized by Leonard Hayflick, a professor of anatomy at the University of California, San Francisco.

In the 1960s, Hayflick discovered that human cells grown in a dish will multiply a finite number of times--a property now known as the Hayflick Limit. These cells later helped ignite the search for the cellular sources of aging, and Hayflick, a former president of the Gerontological Society of America, has since become well known for his skepticism toward claims that human longevity can be significantly lengthened through science.

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Web In Trouble? The Hidden Cables Under A Cornish Beach Feeding The World's Internet

Pictured above is the Atlantic's newest and most advanced submarine cable system. It is so powerful that it could carry the entire internet content in both directions

From The Daily Mail:

Hastily snapped on a camera-phone, the picture below shows where the internet feeds into Britain from New York. The super-high-speed cable is now hidden under six feet of Cornish beach - which is just as well, because if it were discovered and damaged, the entire web in Britain could turn to treacle. Warren Pole reports on the fragile network of ocean cabling that keeps the modern world turning, the madcap economics of internet supply - and why it will run out of space by 2014 unless scientists think of something... fast

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Revealed: How Pandemic Swine Flu Kills

From The New Scientist:

As the H1N1 swine flu pandemic continues to spread around the world, most cases are still mild. But reports are starting to emerge of people who sicken and die very quickly of what appears to be viral pneumonia. Now two independent groups of scientists have now found out why – and it's all down to where the virus binds within the body.

H1N1 swine flu comes from pigs, so it binds well to cell-surface molecules in the respiratory tracts of other mammals, including humans. But there are slight differences in the way different flu proteins bind to these receptors.

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What Did Einstein Know, And When Did He Know It?

Albert Einstein

From Newsweek:

What newly released papers reveal about the physicist.

On July 22 the Einstein Papers Project, located at the California Institute of Technology in Pasadena, will release the 12th volume of letters written or received by Albert Einstein—791 of them—plus transcripts of several notable lectures and interviews the physicist gave, covering the year 1921. It was a momentous 12 months. You might think there are no new revelations to be made about him, but for Einstein groupies the current volume addresses at least one key question: what did Einstein know about an 1887 experiment that discovered that the speed of light is invariant, regardless of the observer's speed or direction of motion—an idea that forms the core of special relativity and that Einstein did not mention when he laid out the theory of special relativity in a 1905 paper?

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Climate Change And The Mystery Of The Shrinking Sheep

Milder winters are causing Scotland's wild breed of Soay sheep to get smaller, despite the evolutionary benefits of possessing a large body. (Credit: iStockphoto)

From Science Daily:

ScienceDaily (July 4, 2009) — Milder winters are causing Scotland's wild breed of Soay sheep to get smaller, despite the evolutionary benefits of possessing a large body, according to new research.

The new study provides evidence for climate change as the cause of the mysterious decrease in the size of wild sheep on the Scottish island of Hirta, first reported by scientists in 2007. The researchers believe that, due to climate change, survival conditions on Hirta are becoming less challenging, which means slower-growing, smaller sheep are more likely to survive the winters than they once were. This, together with newly-discovered so-called 'young mum effect' whereby young ewes produce smaller offspring, explains why the average size of sheep on the island is decreasing.

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The Strange Ingredients In Fireworks

Copper produces blue sparks. Barium, also used in rat poison and glassmaking, makes green. A mix of strontium salts, lithium salts and other stuff makes red. Aluminum and titanium put the white stars in an aerial flag. Image credit: stockxpert

From Live Science:

Fireworks for the 4th of July are all about light, color and sound. But inside, there are some bizarre ingredients, from aluminum to Vaseline and even the stuff of rat poison.

An ancient mix of black powder, essentially gunpowder little changed from its invention in China a millennia ago, gets each rocket in the air by creating pressure in gas trapped in a tube, or mortar.

Two fuses are lit at once: one to ignite the black powder, and another that burns slower, creating a well-timed explosion high in the sky.

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Marie Curie Voted Greatest Female Scientist

Marie Curie has been voted the greatest woman scientist of all time. Photo: PA

From The Telegraph:

Marie Curie, the Nobel Prize-winning nuclear physicist has been voted the greatest woman scientist of all time.

The Polish-born researcher, who discovered radiation therapy could treat cancer, won just over a quarter of the poll (25.1 per cent) - almost twice as much as her nearest rival Rosalind Franklin (14.2 per cent), the English biophysicist who helped discover the structure of DNA.

Only two modern role models made the top ten - astrophysicist Dame Jocelyn Bell Burnell came fourth (4.7 per cent) and Dr Jane Goodall, the world famous primatologist, was tenth (2.7 per cent).

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Hunting For Life In Alien Worlds

An artist's impression of the exoplanet HD 189733b transiting its sun. Astronomers have detected both water vapour and methane in its atmosphere. Image: ESA - C.Carreau.

From Plus Magazine:

Two of the most fundamental questions asked by people, and as yet still unanswered by science, are how life emerged on the Earth, and whether we are alone in the cosmos: does life exist in extraterrestrial locations as well? These deeply important questions form the core of a new kind of science, one that recently has been rapidly gathering momentum. Astrobiology is supported by a flood of new information from studies on the origins of terrestrial life, and our deep-space probes and telescopes exploring the Universe around us. The science incorporates everything from understanding the survival of life in the most extreme environments on Earth and looking for the earliest evidence of cells in the ancient rocks of our planet, to exploring the alien worlds of our solar system to determine if they have ever provided an environment suitable for life of their own.

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Vegetarian Diet 'Weakens Bones'

A vegetarian salad. Australian researchers have said that people who live on vegetarian diets have slightly weaker bones than their meat-eating counterparts. (AFP/File/Jay Directo)

From Yahoo News/AFP:

SYDNEY (AFP) – People who live on vegetarian diets have slightly weaker bones than their meat-eating counterparts, Australian researchers said Thursday.

A joint Australian-Vietnamese study of links between the bones and diet of more than 2,700 people found that vegetarians had bones five percent less dense than meat-eaters, said lead researcher Tuan Nguyen.

The issue was most pronounced in vegans, who excluded all animal products from their diet and whose bones were six percent weaker, Nguyen said.

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Don't Look Down: Terrifying View From Glass Box Balcony Jutting Out From Skyscraper's 103rd Floor

Long way up: Even the floor of the platforms are glass - few
were brave enough to look straight down

From The Daily Mail:

If you're scared of heights, it may be time to look away now.

Not content with having the tallest building in America, the owners of Sears Tower in Chicago have installed four glass box viewing platforms which stick out of the building 103 floors up.

The balconies are suspended 1,353 feet in the air and jut out four feet from the building's Skydeck.

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My Comment: This is so cool.

New Form Of El Nino May Increase Atlantic Storms

From Yahoo News/AP:

WASHINGTON – El Nino may have a split personality.

The warming of the tropical Pacific Ocean has long been known to affect weather around the world, but researchers now say it may come in two forms with different impacts.

The traditional El Nino tends to reduce the number of Atlantic hurricanes. But a form Georgia Tech scientists call El Nino Modoki can lead to more hurricanes than usual in the Atlantic Ocean. Modoki, from Japanese, refers to something that is "similar but different."

The traditional El Nino involves a periodic warming of the water in the eastern part of the tropical Pacific. Indeed, it was first noticed by Peruvian fishermen, who named it after the baby Jesus because it tended to first appear around Christmastime.

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Computer Reveals Stone Tablet 'Handwriting' In A Flash

Archaeologists have discovered more than 50,000 stone inscriptions from ancient Athens and Attica so far. However, attributing the pieces to particular cutters so they can be dated has proven tricky. Traditionally, epigraphers must hunt for giveaways to a cutter's individual style - a tiny stroke at the top of a letter, for instance (Image: Michail Panagopolous et al.)

From New Scientist:

You might call it "CSI Ancient Greece". A computer technique can tell the difference between ancient inscriptions created by different artisans, a feat that ordinarily consumes years of human scholarship.

"This is the first time anything like this had been done on a computer," says Stephen Tracy, a Greek scholar and epigrapher at the Institute for Advanced Study in Princeton, New Jersey, who challenged a team of computer scientists to attribute 24 ancient Greek inscriptions to their rightful maker. "They knew nothing about inscriptions," he says.

Tracy has spent his career making such attributions, which help scholars attach firmer dates to the tens of thousands of ancient Athenian and Attican stone inscriptions that have been found.

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Sea Ice At Lowest Level In 800 Years Near Greenland

There has never been so little sea ice in the area between Svalbard and Greenland in the last 800 years. (Credit: NASA/GSFC)

From Science Daily:

ScienceDaily (July 2, 2009) — New research, which reconstructs the extent of ice in the sea between Greenland and Svalbard from the 13th century to the present indicates that there has never been so little sea ice as there is now. The research results from the Niels Bohr Institute, among others, are published in the scientific journal, Climate Dynamics.

There are of course neither satellite images nor instrumental records of the climate all the way back to the 13th century, but nature has its own 'archive' of the climate in both ice cores and the annual growth rings of trees and we humans have made records of a great many things over the years - such as observations in the log books of ships and in harbour records. Piece all of the information together and you get a picture of how much sea ice there has been throughout time.

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