Role of science in our changing climate

Science will be needed to devise ways to use energy more efficiently to help our climate, and shift to energy sources such as wind, solar, and others.

Water vapor has role in global warming

It's correct that water vapor is the most important greenhouse gas, says Dessler, but "it's not correct to think that therefore carbon dioxide is not important."

Cats: How long have lived with humans?

Cats and people are depicted together in Egyptian art from nearly 4,000 years ago - but the human-cat relationship may go much farther back.

Plastics in ocean biodegrade slowly

He pointed out that plastics have been around for less than 100 years. In that short time span, no group of microorganisms has evolved that is capable of biodegrading plastics.

Climate change affecting Earth’s oceans now

"It's vitally urgent that we reduce emissions as fast as possible and prepare to adapt to changes that will be inevitable because of climate change that is already underway," says Lubchenco.

Ice ages are the outstanding mystery in Earth sciences

"In many ways, the questions that are still outstanding about what causes ice ages are extremely relevant for also understanding our current situation," says Huybers.

Arctic wildlife monitored with unmanned aircraft

Weatherhead said that the real value of unmanned aircraft is allowing scientists to be proactive in studying the Arctic wildlife.

Virginia Burkett on climate impacts in U.S.

Virginia Burkett warned of the possibility of 'abrupt climate change' - rapid, large-scale - that could take place in just a few decades.

Atmospheric CO2 is changing ocean chemistry

Feely says oceans are absorbing carbon dioxide from the atmosphere, which makes them more acidic. He advises 'drastic atmospheric CO2 emission reductions, on the order of 80% by 2050' to avoid serious damage to ocean ecosystems.

Bird count findings of 2009 citizen scientists

Every winter, people in North America are encouraged to go outside and count birds, for science. A report on the 2009 winter bird count, aka the Christmas bird count.