The musk ox, an Arctic species that is a holdover from the Pleistocene, survived terrible climate changes when mastodons and sabertooths went extinct. That may be as much a result of its social structure as its shaggy coat.

"The world's governments face a new battle in South Africa in 2011 between rich and poor about slowing climate change, buoyed by some progress in Mexico but with faded hopes for a new treaty in coming years."

"Plans to open the first major coal export facility on the West Coast are likely to be delayed until next year because of an appeal filed by a coalition of environmental groups, which say shipping coal to Asia throws a wrench in U.S. efforts to reduce international greenhouse gas emissions."

"They call it the 'Jaws' effect. Inspired by the 1975 movie about a great white shark that terrorized a tourist town, waves of fishermen piled into boats and killed thousands of the ocean predators in shark fishing tournaments."

"U.N. climate talks enter into their final phase today as South African President Jacob Zuma joins world leaders to address prospects for a global warming agreement many here hope will be signed in South Africa next year."

"Beetles killing trees in North America, blue tongue disease ravaging livestock in Europe, and borers destroying African coffee crops are examples of migrating invasive species not getting enough attention at global climate talks, scientists said on Wednesday."

"The world's governments struggled on Wednesday to break a deadlock between rich and poor nations on steps to fight global warming and avert a new, damaging setback after they failed to agree a U.N. treaty last year in Copenhagen."