AP - Getting one of the roughly 11,500 permits granted each year to backpack overnight in the Grand Canyon has become so competitive and "unfair" that managers at the national park have decided to change the system.

AP - Since the 1997 international accord to fight global warming, climate change has worsened and accelerated — beyond some of the grimmest of warnings made back then.

AP - Sixty-five world leaders have said they will attend the Copenhagen climate summit in December, and several more have responded positively to invitations, Danish officials said Sunday.

LiveScience.com - The deep sea is teeming with thousands of species that have never known sunlight, explorers now say.

AFP - Flooding in the world's major port cities caused by melting icecaps could cause up to 28 trillion dollars (18 trillion euros) in damage in 2050, environmental group WWF said in a report Monday.

AFP - India's private sector energy giant Reliance Industries Limited has announced a cash bid to buy a controlling stake in bankrupt petrochemicals firm LyondellBasell Industries.

AFP - Astronauts from the US space shuttle Atlantis were to venture into open space Monday on a third and final spacewalk of their mission aimed at maintaining and installing more high-tech equipment on the International Space Station.

HealthDay - THURSDAY, Nov. 19 (HealthDay News) -- People's genetic makeup has been shown to affect how they respond to asthma medications, but a new study finds that many people respond well to a particular combination treatment regardless of their genes.

AP - An auction house says it is selling a rare first edition of Charles Darwin's "On the Origin of Species" found in a family's guest lavatory in southern England.

AFP - Thousands of animal species thrive in the ocean depths beyond the reach of sunlight, between 200 to 5,000 meters below the surface, an international team of scientists has reported after nearly 10 years of research.

Reuters - New fossils unearthed in what is now the Sahara desert reveal a once-swampy world

AP - The U.S. Nuclear Regulatory Commission says the small amount of radiation detected at the Three Mile Island nuclear power plant is not significant.

AP - Drier weather was expected to return to much of the West on Monday as a building ridge of high pressure replaces the eastern Pacific storm from Sunday.

SPACE.com - Talk about one proud papa. Astronaut Randy Bresnik beamed with joy Sunday after hearing news of the arrival of his new baby daughter, who was born on Earth while he orbited above on the International Space Station.

AP - The University of Nebraska's governing board on Friday voted not to place tighter restrictions on embryonic stem cell research than those outlined under federal guidelines, which were expanded after President Barack Obama took office.