What caused a deadly pileup of wildebeest in a Kenyan river?and how many animals were killed?have become topics of debate between wildlife officials and conservationists.

Despite a brush with extinction a few decades ago, the wilder cousins to your Thanksgiving entrée are today thriving on the streets of suburban America.

Animal extinctions, water shortages, and a significant rise in sea level are inevitable, according a UN panel urging immediate action.

The worst cyclone to hit Bangladesh in more than a decade has left at least 3,000 people dead, and officials say that figure is likely to rise sharply.

A minke whale was found stranded deep in the Brazilian rain forest, having traveled hundreds of miles up a freshwater river from the ocean.

Research permits allow Japan to hunt protected humpback whales?the first known large-scale chase since a 1963 moratorium. Critics say it's commercial whaling disguised as research.

Bangladeshis scrambled to deliver aid after last week's cyclone and bury more than 3,000 dead. "Our condition now is worse than dead," said one survivor.