olm_aquatic_salamander_Postojna_cave

Olm, also known as “human fish,” are the only species of cave-dwelling vertebrae in Europe. Image credit: Postojna Cave Park.

Olm, also known as “human fish,” are the only species of cave-dwelling vertebrae in Europe. Image credit: Postojna Cave Park.

Posted 
February 8, 2016
 in 

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