Is It Safe To Exercise In Your 70s?

From Live Science:

This Week's Question: I've been told I should exercise more, but I'm afraid that at my age (73) I might damage something. Am I safer as a couch potato?

All the current scientific evidence shows that geezers should exercise, even though many older people think it could harm them. Study after study demonstrates that seniors hurt their health a lot more by being sedentary.

If you're inactive, you deteriorate. Physical activity can help restore your capacity. Most older adults, regardless of age or condition, will benefit from increasing physical activity to a moderate level.

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Russia's Dark Horse Plan to Get to Mars

Phobos, the larger of the two moons of Mars has many unknowns. For instance, what formed the grooves that run across its surface? Image: ESA/DLR/FU Berlin (G. Neukum)

From Discover:

The Fobos-Grunt mission might pave the way for humanity's first permanent space base—on Phobos, Mars' bizarre moon.

Mars has been nothing but bad luck for the Russians. They have launched 20 probes to the planet since 1960, and all either failed or suffered from severe technical problems. But soon—as early as this October—Russia will attempt to reverse its fortunes with one of the most ambitious unmanned space missions ever.

Instead of aiming straight for Mars, the Russians are going after Phobos, the larger of its two little satellites and one of the oddest objects around. Their probe, called Fobos-Grunt (“Phobos soil” in Russian), will not only land on Phobos but also scoop up some samples of the surface and send them to Earth. Understanding Phobos could tell us a lot about the early history of the solar system. “It may give us clues to the formation of Earth’s moon and the moons of the other planets, and the role played by asteroid impacts in shaping the terrestrial [rocky] planets,” says Alexander Zakharov of the Moscow-based Space Research Institute and chief scientist for Fobos-Grunt. Even more important, this mission could lay the groundwork for an innovative strategy for exploring—and even colonizing—Mars itself.

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U.S. Natural Gas Boom: The Race To Tap Shale's Potential

(Photograph by Harald Sund/Getty Images)

From Popular Mechanics:

Natural gas prices are at a six-year low, but that's not slowing one unconventional—and historically costly—method for extracting gas for energy. Shale gas reserves are contributing to the 11 percent rise in natural gas production the United States has seen in the past two years. But the deposits have been known about for decades—why are these resources drawing attention now?

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Forget Plasma And LCDs: How The 3mm-thick, Eco-Friendly OLED Is The TV Of The Future

The Sony XEL-1 is currently the only OLED TV on the market and priced at £3,500.
The screen is just 3mm thick

From The Daily Mail:

Once they were a must-have for every living room. But LCD and plasma TVs could be about to go the way of the cathode ray tube.

A new generation of super-slim screens will revolutionise home entertainment, according to the makers.

The OLED sets boast the thinnest TV screen created. At its narrowest point it is the width of a pound coin. And technological advances make the image far sharper than on LCD and plasma screens.

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A Serious Search For Extraterrestrial Life

A planet probably the size of Jupiter orbits at a distance about four times that between Neptune and the sun. Many such exoplanets - all atmosphere, no solid surface - have been found since '95, when the first was confirmed.

From Philadelphia Inquirer:

Things have changed since the original Captain Kirk and Mr. Spock set off to seek out new life and new civilizations. Back in the 1960s, while the Enterprise crew was exploring a galaxy full of exotic life-forms, real astronomers were stuck in a solar system with eight desolate-looking neighbors and no signs of any planets beyond.

Now, finally, astronomers are starting to zero in on Earth-like worlds orbiting other stars. Some of the more recent finds even look potentially habitable.

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Energy Availability Is Almost Infinite

Image from Dvice.

From Watts Up With That?

A favorite excuse to push the AGW agenda is that “energy is limited, so we have to preserve it for future generations.” But nothing could be further from the truth. As that clever fellow Albert Einstein figured out ( E = Mc² ) – energy is available right here on earth in vast supplies beyond our comprehension. In fact, a primary concern of mankind over the last 65 years has been to figure out how to keep mankind from releasing some of this energy too quickly, in a catastrophic fashion.

Einstein’s equation tells us that one kilogram of matter can be converted into 90,000,000,000,000,000 (ninety million billion) joules of energy. That is roughly equivalent to saying that one liter of water contains as much potential energy as 10 million gallons of gasoline. Those who saw the movie “Angels and Demons” are familiar with the concept of combining matter and anti-matter to achieve a highly efficient matter to energy conversion. Mankind probably won’t have access to that sort of technology for some time into the future, but we already have hundreds of fission reactors generating a significant percentage of the world’s energy.

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Scientists Identify A Key Protein That May Explain The Anti-Aging And Anti-Cancer Benefits of Dietary Restriction

From The Next Big Future:

High nutrients activate HIF-1 through the TOR-S6K pathway, which leads to increased ER stress and shortened lifespan. Other regulators such as PHA-4, SKN-1, AAK-2, DAF-16 and HSF-1 may function in parallel to HIF-1 to modulate DR-induced longevity phenotypes.

A protein that plays a key role in tumor formation, oxygen metabolism and inflammation is involved in a pathway that extends lifespan by dietary restriction.

The finding, which appears in the May 22, 2009 edition of the on-line journal PLoS Genetics, provides a new understanding of how dietary restriction contributes to longevity and cancer prevention and gives scientists new targets for developing and testing drugs that could extend the healthy years of life.

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Surprising Twist To Photosynthesis: Scientists Swap Key Metal Necessary For Turning Sunlight Into Chemical Energy

The reactions that convert light to chemical energy happen in a millionth of a millionth of a second, which makes experimental observation extremely challenging. A premier ultrafast laser spectroscopic detection system established at the Biodesign Institute, with the sponsorship of the National Science Foundation, acts like a high-speed motion picture camera. It splits the light spectrum into infinitesimally discrete slivers, allowing the group to capture vast numbers of ultrafast frames from the components of these exceedingly rapid reactions. These frames are then mathematically assembled, allowing the group to make a figurative "movie" of the energy transfer events of photosynthesis. (Credit: Arizona State University Biodesign Institute)

From Science Daily:

ScienceDaily (May 23, 2009) — Photosynthesis is a remarkable biological process that supports life on earth. Plants and photosynthetic microbes do so by harvesting light to produce their food, and in the process, also provide vital oxygen for animals and people.

Now, a large, international collaboration between Arizona State University, the University of California San Diego and the University of British Columbia, has come up with a surprising twist to photosynthesis by swapping a key metal necessary for turning sunlight into chemical energy.

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The Whole World Is Optimistic, Survey Finds

From Live Science:

Despite current economic woes, a new study based on global survey data finds optimism to be universal. Sunny outlooks are most prevalent in Ireland, Brazil, Denmark, and New Zealand.

The United States ranks No. 10.

Nearly 90 percent of people around the globe expect the next five years to be as good or better than life today, the study found. And 95 percent expect their life in five years to be as good or better than it was five years ago.

The study, from the University of Kansas and Gallup, suggests humans are optimistic by nature, the researchers conclude.

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Fundamental Mechanism For Cell Organization Discovered

Image: An embryo treated with RNA interference to delay the onset of cell polarization. At the beginning of the process, P granules (green) have already nearly completely dissolved throughout the embryo. However, when the embryo ultimately polarizes, the polarity protein PAR-2 (red) appears on the posterior cortex, and P granules reform by condensation in the vicinity of this posterior region. Credit: Clifford Brangwynne (Credit: Image courtesy of Marine Biological Laboratory)

From Science Digest:

ScienceDaily (May 22, 2009) — Scientists have discovered that cells use a very simple phase transition -- similar to water vapor condensing into dew -- to assemble and localize subcellular structures that are involved in formation of the embryo.

The discovery, which was made during the 2008 Physiology course at the Marine Biological Laboratory (MBL), is reported in the May 21 early online edition of Science by Clifford P. Brangwynne and Anthony A. Hyman of the Max Planck Institute for Molecular Cell Biology and Genetics in Dresden, Germany, and their colleagues, including Frank Jülicher of the Max Planck Institute for the Physics of Complex Systems, also in Dresden.

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Huge Mars Region Shaped by Water, Rover Mission Finds

A false-color image shows Cape St. Vincent, a feature of Mars's massive Victoria Crater. After a dangerous descent into the crater, the Mars rover Opportunity has shown that the red planet once had a network of underground water spread across an area the size of Oklahoma, scientists announced in May 2009. Photograph courtesy Steven W. Squyres

From National Geographic:

Shifting sand dunes on ancient Mars once concealed a network of underground water spread across an area the size of Oklahoma, according to new findings from NASA's Mars rover Opportunity.

In 2004 Opportunity had spotted minerals and blueberry-shaped rocks indicative of ancient groundwater in the Martian crater Endurance.

The robotic explorer has now found similar signs of past water in Victoria, a crater some 3.5 miles (6 kilometers) away.

Opportunity also spotted unique rock layers in the sides of Victoria Crater, which are likely the petrified remnants of ancient sand dunes.

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Opposites Really Do Attract In Human Search For A Mate According To New Study

Photo: Sophie Dahl and Jamie Cullum are living proof that opposites really do attract

From The Daily Mail:

It's an age old theory but when it comes to choosing a mate, opposites really do attract, according to a Brazilian study that found people are subconsciously more likely to choose a partner whose genetic make-up is different to their own.

The study found evidence to suggest that married couples are more likely to have genetic differences in a DNA region that governs the immune system than couples who were randomly matched.

Maria da Graca Bicalho and her colleagues at the University of Parana in Brazil reported that this was likely to be an evolutionary strategy to ensure healthy reproduction because genetic variability is an advantage for offspring.

Bicalho said: 'Although it may be tempting to think that humans choose their partners because of their similarities, our research has shown clearly that it is differences that make for successful reproduction, and that the subconscious drive to have healthy children is important when choosing a mate.'

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Rumor Round-Up: Everything We’ve Heard About the Next iPhone

From Gadget Lab/Wired News:

This month, the Apple rumor volcano erupted with purported details of the next-generation iPhone. Various blogs claim receiving tips from informed sources about features in the highly anticipated handset, such as a magnetometer (digital compass), a video camera and a speedier processor.

Here, we round up every rumor that’s appeared about Apple’s next iPhone, which many are betting will be announced June 8 at the Worldwide Developer Conference in San Francisco. We’re also accompanying each rumor with a percentage rating for its probability to be true, as well as our analysis.

When WWDC arrives, we’ll present a report card showing which publications were correct and which were wrong. And of course, we’ll grade ourselves on our predictions, too.

With that said, here’s everything we’ve heard about the next iPhone:

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Power Plants: Artificial Trees That Harvest Sun And Wind To Generate Electricity

Image: GOING OUT ON A LIMB: A new company called Solar Botanic plans to build artificial trees that reap solar and wind energy. Solar Botanic

From Scientific America:

A start-up proposes forests of fake trees with "leaves" that soak up sunshine and flutter in the breeze to generate clean solar and wind power. Could it just be crazy enough to work?

While on a train ride to visit his sister in the Netherlands in 2002, where monstrous wind turbines now mar scenic views, Alex van der Beek got an idea: Instead of ruining the natural landscape with conventional technology, why not generate electricity from something that blends in—a fake tree?

Van der Beek—whose previous professional experience was teaching alternative medicine—founded Solar Botanic, Ltd., in London last year on the concept. Solar Botanic's ambitious plan involves bringing together three different energy-generation technologies—photovoltaics (aka solar power, or electricity from visible sunlight), thermoelectrics (electricity from heat) and piezoelectrics (electricity from pressure)—all in the unassuming shape of a leaf on its stem.

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Mars Robots May Have Destroyed Evidence Of Life

Photo: This image was taken by NASA's Phoenix Mars Lander's Surface Stereo Imager on June 5, 2008, the eleventh day after landing. It shows the robotic arm scoop, with a soil sample, poised over the partially open door of the lander's oven (Image: NASA / JPL-Caltech / University of Arizona / Texas A&M University)

From New Scientist:

HAVE Mars landers been destroying signs of life? Instead of identifying chemicals that could point to life, NASA's robot explorers may have been toasting them by mistake.

In 1976, many people's hopes of finding life on Mars collapsed when the twin Viking landers failed to detect even minute quantities of organic compounds - the complex, carbon-containing molecules that are central to life as we know it. "It contributed, in my opinion, to the fact that there were no additional [US lander] missions to Mars for 20 years," says Jeff Moore of NASA's Ames Research Center in Moffett Field, California.

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Will Obama Kill Navigation Backup System as GPS Threatens to Fail?

LORAN radio transmission tower. (Photograph by USCG/PA1 Chuck Kalnbach)

From Popular Mechanics:

Obama's budget attempts to ax LORAN-C, a navigation backup program, even as experts at the Government Accountability Office sound warnings about satellite reliability. What will happen if GPS fails?

Even as a government watchdog agency warns that GPS navigation satellites could fail, the Obama administration's proposed fiscal 2010 budget has quietly killed the nation's backup navigation system.

The Government Accountability Office (GAO) released a report last week warning, "It is uncertain whether the Air Force will be able to acquire new satellites in time to maintain current GPS service without interruption. If not, some military operations and some civilian users could be adversely affected." The report also notes that the current program is about $870 million over budget and the launch of its first satellite has been delayed to November 2009, almost three years late.

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Animals Can Tell Right From Wrong

Research suggests that it's not just humans who have a moral compass Photo: GETTY

From The Telegraph:

Animals possess a sense of morality that allows them to tell the difference between right and wrong, according to a controversial new book.

Scientists studying animal behaviour believe they have growing evidence that species ranging from mice to primates are governed by moral codes of conduct in the same way as humans.

Until recently, humans were thought to be the only species to experience complex emotions and have a sense of morality.

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Eureka Moment That Led To The Discovery Of DNA Fingerprinting

Alec Jeffreys with a copy of the first DNA fingerprint profile. Photograph: Rui Vieira/PA

From The Guardian:

Twenty-five years ago academic Alec Jeffreys stumbled on a remarkable discovery. The scientific breakthrough led to DNA fingerprinting - which has since trapped hundreds of killers, freed the innocent and revolutionised science and criminal justice.

On 10 September 1984, geneticist Alec Jeffreys wrote three words - "33 autorad off" - in his red desk diary. The phrase marked the completion of an experiment, set up that summer, to study how inherited illnesses pass through families. It failed completely.

Yet the project remains one of the most profoundly influential pieces of research ever carried out in a British laboratory, for it produced the world's first DNA fingerprint, a technology that has revolutionised crime scene investigations, led to the convictions of murderers and rapists, and transformed immigration disputes and paternity cases.

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Google Earth Maps Out Discrimination Against Burakumin Caste In Japan

The map showed how old ghettos relate to the 21st-century streets

From Times Online:

A handful of innocent-looking antique maps, one offensive word and tens of thousands of offended “untouchables” have plunged Google into an unspoken class war that has raged in Japan for centuries.

Despite its ambition to be the cartographer of the internet age, the search engine has lumbered into one of the darkest corners of Japan — the bigotry of mainstream Japanese society towards the burakumin, the “filthy mob”, whose ancestors fell outside the caste system of the 17th-century samurai era.

By allowing old maps to be overlaid on satellite images of Tokyo, Osaka and Kyoto on its Google Earth service, the search engine shows how the old ghettos relate to the 21st-century streets.

That, critics say, is perfect ammunition to hurt descendants of the people who lived there 400 years ago.

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Ancient Teeth Hint That Right-handedness Is Nothing New

From New Scientist:

Ancient bones suggest "lefties" have been coping with a right-handed world for more than half a million years. A study of Homo heidelbergensis, an ancestor of Neanderthals, seems to show that the ancient humans were predominately right-handed.

"Finding that a hominin species as old as Homo heidelbergensis is already right-handed helps to trace back the chain of modernity concerning hand laterality," says Marina Mosquera, a paleoanthropologist at Universitat Rovira i Virgili in Tarragona, Spain, who was involved in the study.

Humans are the only animal believed to show a strong preference for performing tasks with one hand or the other. Determining when right-handedness first evolved could shed light on traits linked to lateralised brains, such as language and technology, Mosquera says. Efforts to solve this mystery have looked to ancient human skulls and marks left on tools.

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