Painting Rooftops White Would Slow Global Warming

From Sustain A Blog:

Study: If we painted every rooftop in 100 major cities white, it would offset the entire planet’s carbon dioxide emissions for one year. That’s nearly 44 metric gigatons.

It makes sense. We all know white reflects heat (that’s why we wear white shirts and dresses on hot days), and we even knew that painting rooftops white lessens the need for air conditioning. But until now, we didn’t know that changing dark-colored surfaces to white would help fight against global warming.

The news broke yesterday at California’s Climate Change Research Conference. Hashem Akbari, attending the conference from the Lawrence Berkeley National Laboratory, announced that replacing dark shingles on an average-sized household rooftop with a lighter color would offset 10 metric tons of carbon dioxide—comparable to taking two mid-sized cars off the road for a year.

Speaking of roadways, they’re part of the problem too. Because of its cheap nature, most roads are paved with black asphalt instead of light grey concrete, which causes roads to absorb an inordinate amount of heat. Repaving roads with lighter-colored materials would have a similar impact to painting rooftops.

California already mandates that newly-built large buildings have light-colored rooftops, but the law was intended to decrease air conditioning costs. Akbari hopes to enlist the United Nations in an effort to convince major cities to make their roadways and rooftops more pale.

Read a full summary of the report here.

Black Hole's 'Birth Scream' Heard Across Universe

From FOX News:

Six months ago, satellite telescopes spotted an exceptionally bright burst of energy that would have been the most distant object in the universe ever visible to the naked eye, if anyone had noticed it.

Even though no humans have reported seeing it directly, the gamma-ray burst, an explosion that signals the violent death of a massive star, is changing theories of how these events look.

Gamma-ray bursts are typically accompanied by intense releases of other forms of radiation, from X-rays to visible light.

This burst, dubbed GRB 080319B, was first detected by the Swift satellite on March 19, while the spacecraft was serendipitously looking at another gamma-ray burst in the same area of the sky.

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9 Big Questions On NASA Infighting

From Popular Mechanics:

As if a new administration and the rise of the private space industry weren't enough, it's suddenly become an even more critical time for NASA, with its ambitious plans to send manned missions to the moon and Mars while facing mounting fiscal and political realities. The Orion spacecraft at the heart of the agency's next-gen Constellation exploration program is being designed to resupply the International Space Station and fly to the moon, but the space shuttle fleet is due to retire in 2010 and Orion won't be ready to fly in time. The plan is to use Russia's spacecraft to make the supply runs, but that nation's war with Georgia has cast doubt on that plan. Grumbling from engineers and officials inside NASA is joining a chorus of outside critics, so we asked four-time shuttle astronaut Tom Jones to help make sense of the turmoil. —Jennifer Bogo

In the internal e-mail written by NASA administrator Michael Griffin, which was leaked to the Orlando Sentinel recently, he articulates a catch-22 in the space program: If we continue to fly the shuttle past its retirement date, it harms our long-term prospects of manned travel by competing for funds with the Constellation program. But if we retire the shuttle as planned, our short-term prospects are impaired by the tenuous situation with Russia. Have we painted ourselves into a corner?

Remember, Griffin was ordered to stop flying the shuttle in 2010. You know, get it off the stage as soon as possible. Then he was told, "Bring on Orion as quickly as you can after that." The original plan, about four years ago, was for Orion to be ready by 2012. But Congress has been given budgets every year by the president that have not included the funds to do these things at the pace they need. So the two-year gap turned into a five-year gap. Congress figured there was no downside: Just let it slip and, big deal, we have a long gap. That was all fine when it was five or six years in the future, but now the Russians have turned unfriendly, and we don't know where that's going to go. And suddenly a bunch of people are saying, "There's this big, long gap, and it's unacceptable, and, NASA, why didn't you take care of this?"

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Why Ike Could Be Texas' Worst Nightmare

The unnamed Category 4 hurricane that slammed into Galveston, Texas Sept. 8, 1900 remains the deadliest ever to hit the United States, having killed at least 8,000 people (estimates vary) and leveling virtually the entire town. Credit: NOAA

From Live Science:

As Hurricane Ike revs up again over the Gulf of Mexico, residents of coastal Texas, especially Houston and Galveston, are preparing for the arrival of the monstrous storm, which could be the most devastating that the Lone Star State has seen Hurricane Alicia came ashore in 1983, causing nearly $6 billion in damage and 21 fatalities.

Ike is huge. Hurricane-force winds extend out 120 miles (195 kilometers) from the storm's center, and tropical storm-force winds reach out 275 miles (445 km), both measurements exceeding what's seen with many storms. Ike could reach major hurricane status as a Category 3 before it makes landfall late Friday or early Saturday morning somewhere along the Texas coast.

And right now it looks like that somewhere will be the Houston/Galveston area.

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Fifty Years Of Earth-Observation Satellites

Views such as this one are made possible by satellites orbiting the planet, a feat they have been performing for the past half-century. Although such satellites were initially put in place for military uses, most current ones are used to observe the Earth, and they have provided a wealth of information about the world. This image of an aurora was compiled from data collected in July 2000 by NASA’s Polar satellite, which ceased operation earlier in 2008. The data were recorded in ultraviolet light, as the event occurred during daylight hours. False color from blue to red corresponds to increasing magnetic activity.

From American Scientist:

Views from space have led to countless advances on the ground in both scientific knowledge and daily life

A half a century ago, the launch of Sputnik-1 saw the start of an era where we began to launch artificial satellites into orbit to tell us what we look like from above. Hundreds of Earth-observing satellites have followed, and this extensive remote sensing has provided both iconic views and unprecedented insights into our planet. Tatem, Goetz and Hay review the development of these satellites over the past 50 years, as well as the data they have produced, which has lead to a greater understanding of Earth's terrestrial, aquatic and atmospheric processes. They examine current trends and speculate on what the next 50 years of satellite remote sensing may bring.

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The Microchip's 50th Birthday Party

The first integrated circuit invented by Jack Kilby. Kilby won the Nobel Prize for Physics in 2000 for his work.

Happy 50th Birthday: Microchip Celebrates Five
Decade Milestone -- Daily Mail

When Jack Kilby demonstrated the first working integrated circuit in Texas in 1958, he could have had no idea how his invention would change the world.

Now 50 years later, microchips are integral to modern-day life in devices as wide-ranging as computers to credit cards, cameras to cookers.

Kilby's design used a strip of germanium, rather than silicon, with one transister and other components glued on to a glass slide.

In July, the electrical engineer had not been allowed to go on holiday because he had only recently joined the company Texas Instruments. Kilby used the time to create his ground-breaking design, which tackled the problem of connecting large numbers of electronic components in circuits in a cost-effective way.

Jim Tully, vice president at the technology analyst Gartner said the microchip slashed the cost in producing electronics, which allowed the technology to spread rapidly through all areas of society.

'Integrated circuits are so woven into our lives that it would be hard to imagine a world without them,' Tully said.

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Eight Organisms That Make You Go 'Eww'

From MSNBC:

Skunk. The mere mention of the black and white mammal is enough to make people plug their noses. That's because these creatures are legendary for deterring predators with an oily, foul-smelling spray emitted from glands on either side of their anus. Eww. Some species can shoot the fetid substance more than ten feet and whatever it hits may forever carry the stench. As a defense mechanism, scientists say the stinky spray is quite effective: Most would-be skunk predators stay away unless they have nothing else to eat. Even humans are well trained to keep their distance.

When the skunk in this photo got its head stuck in a jar of salad dressing, a police officer cracked it off with a pellet gun fired from 40 feet away.

Click here for the other nine.

U.N. Agency Eyes Curbs On Internet Anonymity

From CNET News:

A United Nations agency is quietly drafting technical standards, proposed by the Chinese government, to define methods of tracing the original source of Internet communications and potentially curbing the ability of users to remain anonymous.

The U.S. National Security Agency is also participating in the "IP Traceback" drafting group, named Q6/17, which is meeting next week in Geneva to work on the traceback proposal. Members of Q6/17 have declined to release key documents, and meetings are closed to the public.

The potential for eroding Internet users' right to remain anonymous, which is protected by law in the United States and recognized in international law by groups such as the Council of Europe, has alarmed some technologists and privacy advocates. Also affected may be services such as the Tor anonymizing network.

"What's distressing is that it doesn't appear that there's been any real consideration of how this type of capability could be misused," said Marc Rotenberg, director of the Electronic Privacy Information Center in Washington, D.C. "That's really a human rights concern."

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U.S. Makes 1st Antarctic Night Landing

From CBS News:

(AP) A U.S. Air Force pilot has landed a plane in Antarctica in the dark for the first time using night-vision goggles, a feat that could lead to more supply flights to scientific bases in the frozen continent during its dark winter months, officials said Friday.

The C-17 Globemaster cargo airplane landed in a driving snowstorm on the six-mile ice runway at the U.S. Antarctic research center at McMurdo Station, after months of practice runs by pilots using the goggles.

The Air Force plane took off from Christchurch, New Zealand, and flew nearly six hours before landing Thursday night. It returned to Christchurch early Friday.

Air Force Lt. Col. Jim McGann said the airplane's own lights - reflecting off of traffic cones - allowed it to land without electrical runway lights that are too hard to maintain in the frozen environment.

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Meat: Making Global Warming Worse

From Time Magazine:

Need another reason to feel guilty about feeding your children that Happy Meal — aside from the fat, the calories and that voice in your head asking why you can't be bothered to actually cook a well-balanced meal now and then? Rajendra Pachauri would like to offer you one. The head of the U.N.'s Nobel Prize–winning Intergovernmental Panel on Climate Change, Pachauri on Monday urged people around the world to cut back on meat in order to combat climate change. "Give up meat for one day [per week] at least initially, and decrease it from there," Pachauri told Britain's Observer newspaper. "In terms of immediacy of action and the feasibility of bringing about reductions in a short period of time, it clearly is the most attractive opportunity." So, that addiction to pork and beef isn't just clogging your arteries; it's flame-broiling the earth, too.

By the numbers, Pachauri is absolutely right. In a 2006 report, the U.N. Food and Agriculture Organization (FAO) concluded that worldwide livestock farming generates 18% of the planet's greenhouse gas emissions — by comparison, all the world's cars, trains, planes and boats account for a combined 13% of greenhouse gas emissions. Much of livestock's contribution to global warming come from deforestation, as the growing demand for meat results in trees being cut down to make space for pasture or farmland to grow animal feed. Livestock takes up a lot of space — nearly one-third of the earth's entire landmass. In Latin America, the FAO estimates that some 70% of former forest cover has been converted for grazing. Lost forest cover heats the planet, because trees absorb CO2 while they're alive — and when they're burned or cut down, the greenhouse gas is released back into the atmosphere.

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Russia May Build Own Particle-Colliding Machine

From RIA-Novosti:

MOSCOW, September 11 (RIA Novosti) - A day after the Large Hadron Collider was successfully switched on in Switzerland, a Russian scientist said Russia could build its own collider.

Viktor Matveev said that scientists around the world are currently considering a proposal by their Russian colleagues to build a new collider.

The idea was put forward by scientists from the Joint Institute for Nuclear Research in Dubna, who suggested that a new device be built in the Moscow Region.

He said that a delegation of international scientists had visited the proposed site and concluded that, "It is one of the best places in the world for construction of that kind."

Matveev also said that the idea for the collider "came from Russia," and that the world's first collider had been built by scientists in the West Siberian city of Novosibirsk.

He went on to say that the collider, which could be even more powerful than the European version, would boost Russian scientific progress and allow young researchers to take part in the projects to follow.

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Websites Shed Light On How Humans Value Fresh Ideas

From New Scientist:

Analysing the rise and fall of websites is the perfect way to shed light on the old debate over whether talent or experience matters most, say mathematicians.

The question crops up everywhere, from job interviews to presidential races, says Vwani Roychowdhury, but it's hard to examine the problem using hard figures.

However, the same way of thinking can be applied to websites, which also succeed or fail based on many millions of human decisions. In fact, the web may be one of the few places it is possible to quantify the balance between the two, say the researchers.

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With Hurricane Ike, Size Matters For Killer Storm Surge

From My Way/AP:

Hurricane Ike's gargantuan size - not its strength - will likely push an extra large storm surge inland in a region already prone to it, experts said Thursday.

Ike's giant girth means more water piling up on Texas and Louisiana coastal areas for a longer time, topped with bigger waves. So storm surge - the prime killer in hurricanes - will be far worse than a typical storm of Ike's strength, the National Hurricane Center said.

And because coastal waters in Texas and Louisiana are so shallow, storm surge is usually larger there than in other regions, according to storm experts. A 1900 hurricane following a similar track to Ike inundated Galveston Island, killing at least 8,000 people - America's deadliest storm.

"It's a good recipe for surge," said Benton McGee, supervisory hydrologist at the U.S. Geological Survey's storm surge center in Ruston, La. "We're already seeing water being piled up in the Gulf. On top of that you're going to have water forced into the bays along the coast."

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Sleek Probe To Map Earth’s Gravity

From Science Daily:

ScienceDaily (Sep. 10, 2008) — The European Space Agency is launching a new satellite to map variations in the Earth’s gravity field with unprecedented accuracy. The satellite will give UK scientists vital information about ocean circulation and sea level change needed to improve climate forecast models.

The Gravity field and steady-state Ocean Circulation Explorer (GOCE) is the first of three Earth Explorer core missions in ESA’s Earth Observation Envelope Programme. Data from GOCE will allow scientists to create a detailed model of the Earth's gravity field, or geoid.

“GOCE will yield details of the Earth's gravity field to an accuracy and resolution that is simply unobtainable by existing terrestrial and space techniques,” says Professor Philip Moore from Newcastle University, who specialises in gravity research.

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Why Female Spiders Eat Their Mates

From MSNBC:

Small males are easier to catch and are more likely to be prey

In many spider species, females eat the males after sex. Studies have suggested various complex evolutionary reasons involving costs and benefits to the species, sperm competition and esoteric sexual selection schemes.

Turns out the motivation for this creepy cannibalism is much simpler.

It's all about size. If males are small, they're easier to catch and therefore more likely to be prey, say Shawn Wilder and Ann Rypstra from Miami University in Ohio. Big females eat their puny mates simply because a) they're hungry and b) they can.

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Converting Fibre Into Fuel Without Using Enzymes

From Fibre To Fuel In A Flash -- Nature

Chemists convert cellulose to potential biofuel without enzymes.
A genuine revolution in biofuels is currently hindered by the difficulty of converting the most recalcitrant parts of plants, primarily the cellulose of their fibres, into useful fuel. Two chemists in California now claim that it might be remarkably easy to do just that with little more than a strong acid to break down the cellulose.

Mark Mascal and Edward Nikitin of the University of California, Davis say their new process is the most efficient way yet described for converting cellulose into small, energy-rich organic molecules, using no more than basic textbook chemistry.

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1843 Stellar Eruption May Be New Type Of Star Explosion

An artist's conception of the fast blast wave from Eta Carinae's 1843 eruption, which today has caught up with a slow-moving shell ejected in a previous outburst about 1,000 years ago, producing a bright fireworks display that heats the older shell and makes it emit X-rays (orange). The well-known two-lobed "Homunculus" nebula, a slow-moving shell of gas and dust also produced in the 1843 eruption, is shown closer to the star, which is a hot blue supergiant. (Credit: Gemini Observatory artwork by Lynette Cook)

From Science Daily:

ScienceDaily (Sep. 11, 2008) — Eta Carinae, the galaxy's biggest, brightest and perhaps most studied star after the sun, has been keeping a secret: Its giant outbursts appear to be driven by an entirely new type of stellar explosion that is fainter than a typical supernova and does not destroy the star.

Reporting in the Sept. 11 issue of Nature, University of California, Berkeley, astronomer Nathan Smith proposes that Eta Carinae's historic 1843 outburst was, in fact, an explosion that produced a fast blast wave similar to, but less energetic than, a real supernova. This well-documented event in our own Milky Way Galaxy is probably related to a class of faint stellar explosions in other galaxies recognized in recent years by telescopes searching for extragalactic supernovae.

"There is a class of stellar explosions going off in other galaxies for which we still don't know the cause, but Eta Carinae is the prototype," said Smith, a UC Berkeley postdoctoral fellow.

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Tracking Hurricane Ike

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Hurricane History: Texas A Top Target

The unnamed Category 4 hurricane that slammed into Galveston, Texas Sept. 8, 1900 remains the deadliest ever to hit the United States, having killed at least 8,000 people (estimates vary) and leveling virtually the entire town. Credit: NOAA

From Live Science:

Florida and Louisiana have had an unfair share of hurricane activity these past four years while Texas has generally taken less of a beating.

That could change this week as powerful Hurricane Ike takes aim at the Lone Star State.

In fact, Texas has been in the crosshairs many times before and is second only to Florida among U.S. states in the number of direct hits from hurricanes.

It seems ages ago now, but it was just seven weeks back that Dolly struck southern Texas, knocking down trees and power lines and causing extensive flooding of low-lying areas. Preliminary damage estimates were put at $1 billion or more. In some isolated areas, rainfall reached 16 inches. But Dolly was not a major hurricane. Its peak wind gusts were around 100 mph, and its eye made landfall, on July 23, in a largely uninhabited area.

The big storm that defines the hurricane threat to Texas was the disaster that struck Galveston more than a century ago.

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Minor Planet May Help Explain Comets

From The Globe And Mail:

WASHINGTON — A newly discovered "minor planet" with an elongated orbit around the Sun may help explain the origin of comets, researchers said Monday.

The object, known as 2006 SQ372, is starting the outward portion of a 22,500-year orbit that will take it 240 billion kilometres away from the Sun.

The icy lump of rock is just over three billion kilometres from Earth, a bit closer than the planet Neptune, researchers told a symposium on Monday. They will publish their findings in the Astrophysical Journal.

The orbit of 2006 SQ372 is an ellipse four times longer than it is wide, said University of Washington astronomer Andrew Becker, who led the research team. Sedna, a distant, Pluto-like dwarf planet discovered in 2003, is the only other object with a similar orbit, but not nearly as stretched out.

The new object is about 100 kilometres in diameter.

"It's basically a comet, but it never gets close enough to the Sun to develop a long, bright tail of evaporated gas and dust," Dr. Becker said in a statement.

University of Washington graduate student Nathan Kaib said it is unclear how the object formed.

"It could have formed, like Pluto," he said, "in the belt of icy debris beyond Neptune, then been kicked a large distance by a gravitational encounter with Neptune or Uranus."

More likely, he said, it came from the Oort Cloud, a distant reservoir of icy, asteroid-like bodies that orbit the Sun at distances of several trillion kilometres.

"One of our goals is to understand the origin of comets, which are among the most spectacular celestial events. But the deeper goal is to look back into the early history of our solar system and piece together what was happening when the planets formed," Mr. Kaib said.