A new theory emerges for where some fish became four-limbed creatures

Tuesday, December 27, 2011 - 17:00 in Biology & Nature

A small fish crawling on stumpy limbs from a shrinking desert pond is an icon of can-do spirit, emblematic of a leading theory for the evolutionary transition between fish and amphibians. This theorized image of such a drastic adaptation to changing environmental conditions, however, may, itself, be evolving into a new picture.

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