The secret to the embryos’ quick-escape lies in their hatching glands — special glands, which release an enzyme that dissolves the egg membrane. In many frogs, hatching glands are loosely scattered on ...

What prompts the embryos of certain frogs to hatch early if shaken by a hungry reptile but not if buffeted by an outside force such as rain? According to biologist Karen Warkentin, it's a ...

Even as little embryos in eggs, red-eyed tree frogs are totally badass. Researchers have discovered that when the embryos are attacked by a hungry predator, they can wiggle their way out of their eggs ...