Wasps drive frog eggs to (escape) hatch

Tree frog embryos plop out of their eggs in moments of danger, and now a researcher has found that their responses are proportional to the threat.

A wasp lands on a clutch of red-eyed tree frog eggs too young to hatch. Warkentin

That an embryo can respond at all to predators represents a recent rethinking of the powers of eggdom.