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image: Polar Bear More Ancient Than Realized

Polar Bear More Ancient Than Realized

By | April 20, 2012

A genetic analysis reveals that the polar bear split from the brown bear some 600,000 years ago.

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image: Spotted: Emperor Penguins

Spotted: Emperor Penguins

By | April 17, 2012

Satellites are used to count the number of penguins living in Antarctica.

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image: Spotting a Giraffe's Age

Spotting a Giraffe's Age

By | April 11, 2012

A giraffe’s spots can give away its years.

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image: Telltale Tortoises

Telltale Tortoises

By | April 1, 2012

Researchers are permanently marking endangered reptiles in Madagascar to keep the animals from entering the illegal wildlife trade. Read the full story. [gallery]

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image: Marked for Life

Marked for Life

By | April 1, 2012

Conservationists working in Madagascar are doing the unthinkable—defacing the shells of endangered ploughshare tortoises—but it may be the animals’ last hope.

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image: Opinion: Saving an Owl from Politics

Opinion: Saving an Owl from Politics

By | March 26, 2012

The imperiled northern spotted owl faces extinction if efforts enacted to save it continue to put politics ahead of science.

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image: New Frog Species in NYC?

New Frog Species in NYC?

By | March 15, 2012

Genetic data support designating a New York City-area leopard frog as a unique species.

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image: Self-cloning Coral

Self-cloning Coral

By | March 1, 2012

Coral embryos broken apart by waves can continue developing into adult clones.

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image: Coral Clones

Coral Clones

By | March 1, 2012

The colorful and fragile start to the life of a living reef

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image: Preserving Endangered Gametes

Preserving Endangered Gametes

By | March 1, 2012

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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