A developing frog embryo in its jelly-like egg mass can be quite the escape artist: When predators come calling, the red-eyed tree frog embryo can detect the threat and drop out of its egg to safety ...

That’s a frog embryo, leaving its egg to enter the world, and this embryo can hatch at will. The red-eyed tree frog lays its eggs on a branch or leaf above the water. Once they’re in the last third of ...

A pinch of methylmercury is just ducky for mallard reproduction, according to a new federal study. The findings are counterintuitive, since methylmercury is ordinarily a potent neurotoxic pollutant.

Wondering what happens when Sea Monkey eggs are placed in water, this experiment explores the fascinating moment of potential life emerging from tiny dormant eggs. Watch as we carefully prepare the ...

March 23 — To the Editor: In spring or fall of the school year, many teachers will place fertilized eggs in incubators in their classrooms which will hatch within 3-4 weeks, ostensibly to teach ...

The rest of this article is behind a paywall. Please sign in or subscribe to access the full content. Glassfrog embryos know when they’ve been abandoned. Luckily, they’re flexible, adapting well to ...