Science - AP

NEW YORK - A New York high school student has won a prestigious science competition for a project examining resistance to chemotherapy. Full Story »

Around 15,000 delegates, environmentalists, scientists, journalists and others gathered in Copenhagen on Monday to begin two weeks of negotiations on what to do about climate change. Here's a look at what's happening there: Full Story »

_U.S.: President Barack Obama has pledged cutting emissions by 17 percent from 2005 levels by 2020. That represents a 3-4 percent cut from 1990 levels — the benchmark used by most countries. Aims to reach a 41 percent reduction by 2030 and 83 percent by 2050. Requires that Congress passes complex climate legislation. Full Story »

1750 — Before Industrial Revolution, atmosphere holds 280 parts per million of heat-trapping carbon dioxide (CO2). Full Story »

CAPE CANAVERAL, Fla. - A rocket carrying an Air Force satellite that will be used by the military has launched from Cape Canaveral. Full Story »

WACO, Texas - A site where dozens of prehistoric mammoths died in a landslide and flooding some 68,000 years ago has opened to the public in Waco, Texas. Full Story »

KUMANO, Japan - Thousands of tuna, their silver bellies bloated with fat, swim frantically around in netted areas of a small bay, stuffing themselves until they grow twice as heavy as in the wild. Full Story »

BANGKOK - In a potentially valuable boost to fighting climate change, rich and poor countries are close to an agreement to end the destruction of the world's forests in 20 years, government negotiators said. Full Story »

In a Dec. 3 story about efforts to adapt to global warming, The Associated Press reported erroneously the university affiliation of one scientist. Camille Parmesan is at University of Texas at Austin, not Texas A&M University. Full Story »

With the world losing the battle against global warming so far, experts are warning that humans need to follow nature's example: Adapt or die. Full Story »