World's smallest vertebrate

A frog sits on a U.S. dime in this photo taken by Louisiana State University herpetologist Christopher Austin near the Amau River in Papua, New Guinea. The species was claimed as the world's smallest vertebrate, Jan. 11, 2012. (Christopher Austin/Louisiana State University/AP Photo).


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Bururi long-fingered frog

This little blue critter is a Bururi long-fingered frog from East Africa -- the first one seen in 62 years. Scientists thought it was extinct, a victim of civil war and deforestation. (David Blackburn/California Academy of Sciences).


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