A genetic analysis reveals that the polar bear split from the brown bear some 600,000 years ago.
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Satellites are used to count the number of penguins living in Antarctica.
Researchers are permanently marking endangered reptiles in Madagascar to keep the animals from entering the illegal wildlife trade. Read the full story. [gallery]
Conservationists working in Madagascar are doing the unthinkable—defacing the shells of endangered ploughshare tortoises—but it may be the animals’ last hope.
The imperiled northern spotted owl faces extinction if efforts enacted to save it continue to put politics ahead of science.
Genetic data support designating a New York City-area leopard frog as a unique species.
Coral embryos broken apart by waves can continue developing into adult clones.
Pierre Comizzoli, a reproductive physiologist at the Smithsonian Conservation Biology Institute, chats about his efforts to rescue endangered species from extinction using in vitro fertilization as well as novel gamete preservation techniques.
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