After weeks or months, these larvae undergo a process of metamorphosis, which see the tadpoles change into frogs—growing legs, lungs to ... only been known to go back to the Cretaceous Period ...

There the female discharges a watery fluid, whips it to a foam with her back legs, and puts in her eggs ... Five days later tadpoles will wiggle free of the nest and plop into the water below.

Soon they'll be tiny black tadpoles swimming in the water, breathing through gills on each side of the head. They're still growing and changing. Back legs grow first, then front legs. No need for ...