Birds and turtles work hard even before they hatch from their eggs

You would think an embryo in an egg could relax. They can’t eat, or go anywhere; what can the world ask of them, besides that they grow? A decade ago it would have seemed ridiculous to talk about “embryo behavior.” Now, though, we know that even embryos have things to do.

5886390837_0fbe49d395_z

There’s more going on in there than you think. Photo by Chris SetterĀ on flickr, used via a Creative Commons license.

Continue reading

Advertisements