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Environment

Bush Urges Curbs on Greenhouse Gases by 2009

The United States will engage in new international negotiations to reduce greenhouse-gas emissions, according to a plan President Bush announced Thursday. The president heads to Germany next week to discuss climate change with other world leaders.

Bush Urges Curbs on Greenhouse Gases by 2009

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Research News

Study: Human Ancestors Walked Upright Early

When our human ancestors first descended from the trees, they scurried around on all fours before eventually learning to walk upright. Or did they? A report in the journal Science argues orangutans actually learned to walk upright while they were still living in trees.

Study: Human Ancestors Walked Upright Early

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Environment

NASA Scientist Critiques Bush's Strategy

President George Bush unveiled his strategy on climate change Thursday, and NASA's top climate change scientist at the Goddard Institute for Space Studies says the announcement is a timely one.

NASA Scientist Critiques Bush's Strategy

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2007 G-8 Summit in Germany

Bush Calls for International Emissions Effort

President Bush called a meeting of the world's top greenhouse-gas emitters Thursday. Bush wants to join with China, India and others to set a global limit for greenhouse-gas emissions. The president made the speech in advance of the G-8 summit in Germany next week.

Bush Calls for International Emissions Effort

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Sports

Prosthetics in Sports: Disability or Advantage?

Oscar Pistorius, a double amputee from South Africa, calls himself the fastest man on no legs. He wants to race on prosthetics against the best two-legged sprinters in the world. But the international governing body on track and field declared that his prosthetics give him an unfair advantage.

Prosthetics in Sports: Disability or Advantage?

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Americans Staying Up Past Bedtime, Study Finds

A new poll shows that Americans are sleeping less and less. Yet we still come up with all sorts of excuses to stay up late and wake up early. Sleep expert William Dement explains why Americans rationalize their lack of sleep and why so few of us are getting the recommended eight hours.

Americans Staying Up Past Bedtime, Study Finds

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Space

NASA Chief Questions Urgency of Global Warming

NASA administrator Michael Griffin defends the space agency's programs, including plans for a permanent moon base and manned missions to Mars. He also says that the agency has no authorization to "take actions to affect climate change in either one way or another."

NASA Chief Questions Urgency of Global Warming

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Space

Blue Moon on Thursday? Not So Fast

There is a prevailing myth about what a blue moon is. Thursday, May 31, will bring the second full moon of the month. But that does not constitute a blue moon, as is popularly believed. Robert Siegel talks with Kelly Beatty, editor of Night Sky magazine and executive editor of Sky and Telescope.

Blue Moon on Thursday? Not So Fast

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What to Do

Hawaii Family Lives Off the Grid

Maire Sanford and David Lahti moved to Hawaii from Seattle, hoping to live a quieter life. They found one, but financial constraints have led them to live more simply and ecologically than they imagined, in an off-the-grid tent home.

Hawaii Family Lives Off the Grid

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Environment

Hawaii Businessmen Back Renewable Energy Plan

Real estate expert David Cole is trying to help Hawaii become less reliant on fossil fuels. In partnership with AOL's Steve Case and venture capitalist Vinod Khosla, they are trying to help the state become a model for renewable energy.

Hawaii Businessmen Back Renewable Energy Plan

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TB Patient Sparks Public Health Scare

Air Passenger Might Have Exposed Travelers to TB

A man with a rare, drug-resistant form of tuberculosis is under a federal quarantine order after returning from a trip to Europe. Authorities say he might have exposed passengers and crew aboard two trans-Atlantic flights earlier this month.

Air Passenger Might Have Exposed Travelers to TB

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Air Traveler Prompts Discussion of Rare TB Strain

A man with a rare but deadly form of drug-resistant tuberculosis ignored a warning and flew to Europe. He then evaded a no-fly order and returned to the United States, where he is now quarantined. Guests examine the risks and answer questions about the rare type of TB that the passenger has.

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Space

New, Distant Planets Discovered

Astronomers have announced the discovery of 28 more planets outside our solar system. Although the new finds are Jupiter-like "gas giants" with no solid surface, they are all part of multiple planet systems like our own. Smaller, Earth-like planets could also be in those systems, but for now, they're too small to detect.

New, Distant Planets Discovered

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Environment

Studying a Koala Mystery in Eastern Australia

One of the best places to learn about koalas is St. Bees Island off the coast of eastern Australia. Biologist Alistair Melzer is studying why the iconic animal is thriving there, even as it is dying out in other parts of Australia.

Studying a Koala Mystery in Eastern Australia

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Causes

Resource-Rich Hawaii Depends On Fossil Fuel

Despite its vast sources of renewable energy, Hawaii is 92 percent dependent upon fossil fuel. That's more than any other state in the country, and environmentalists are trying to raise awareness of the impact.

Resource-Rich Hawaii Depends On Fossil Fuel

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