Three-day-old embryos of red-eyed treefrog species Agalychnis callidryas. These embryos have external gills that protrude toward the surface of their eggs, where oxygen is most concentrated. This adaptation allows for high metabolic rates and accelerated development.  Credit: Karen M. Warkentin, Boston University

Three-day-old embryos of red-eyed treefrog species Agalychnis callidryas. These embryos have external gills that protrude toward the surface of their eggs, where oxygen is most concentrated. This adaptation allows for high metabolic rates and accelerated development. 

Credit: Karen M. Warkentin, Boston University

(Source: nsf.gov)



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    This is a prime example of “creepy cute”
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    I remembered checking newly fertilized toad eggs last semester,...all I can see were...
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    “It is proof der is babby no abrtions!” But just kidding, for serious.
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