Tiny structures in well-preserved remains point the way to an animal's pigment.
The deep-sea dweller, long thought extinct, has a vestigial lung lurking in its abdomen.
When a northern white rhino died in the Czech Republic recently, it left four remaining -- on the entire planet! Julia explains the science behind how animals are deemed to be extinct or endangered.
The never-before seen, and now extinct, species confirms that the creatures once lived in the Caribbean, where they are not found today.
The Bengal tiger, Caspian tiger and several others could soon be history if a new way of thinking about conservation is adopted.
The population of the yellow-breasted bunting has plunged by 90 percent since 1980.
Which came first: heads or brains? One of the oldest brains ever discovered is helping to answer that question and more.
Until this year, scientists hadn't seen the Bouvier's red colobus monkey in the wild since the 1970s.
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