Image of the Day: See You Later!

Developmental biologists take a close look at how alligator embryos grow. 

By The Scientist Staff | January 8, 2018

An alligator embryo during organogenesis, with nerves, muscle tissues, and cell nuclei fluorescently labeled (green, orange, and blue, respectively)JOÃO FRANCISCO BOTELHO, YALE UNIVERSITY Alligator embryos share many characteristics with bird embryos, a hallmark of their shared evolutionary heritage. Their last common ancestor lived some 250 million years ago, and would have resembled a small dinosaur. Evolutionary biologists are comparing the development of chicken and alligator embryos to pinpoint stages where bird and crocodylian features emerge. 

This image was a winner of the Federation of American Societies for Experimental Biology’s 2017 BioArt Contest


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