EnvironmentJune 11, 2008
Threatened Wildlife in the Here and Now [Slide Show]
More pictures from a traveling photo exhibit of creatures on the brink
Extinction
EnvironmentMay 9, 2005
Pleistocene Park
Researchers working in northern Siberia have been striving to restore the grassland ecosystem that supported mammoths, woolly rhinoceroses and other giants during the Pleistocene epoch, between 1.8 million and 10,000 years ago.
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EvolutionApril 2, 2004
Fossil Illuminates Evolution of Limbs from Fins
EnvironmentNovember 27, 2001
Land Size Limits Body Size of Biggest Animals
EvolutionNovember 2, 2001
Researchers Reconstruct the Rise of the Woolly Mammoth