A small tissue fold in fly embryos, once thought purposeless, plays a vital role in stabilizing tissues. Researchers show that it absorbs stress during early development, and its position and timing ...

By tracking neural crest cells in catshark embryos, researchers discovered that the molecular toolkit behind face-building is surprisingly conserved across jawed vertebrates. The real differences ...

Humans do not have tails, but do we have “what it takes” for a tail? Hens don’t have teeth, but they have the genes for it. With atavism, it is as if our genomes serve as archives of our evolutionary ...

Includes Malpighi's De formatione pulli in ovo (On the formation of the chick in the egg), v. 2, p. [932]-981; and his Appendix repetitas auctasque de ovo incubato observationes continens (Repeated ...

Think of a small fossil as the equivalent of a homemade video of prehistoric life. Fossils formed when sea organisms began ...

Embryological Concepts in the Twentieth Century -- Questions Posed by Classical Descriptive and Experimental Embryology -- Ross Harrison's Contributions to Experimental Embryology -- Analysis of ...

Have you ever looked at a human embryo and thought, “That kind of looks like a fish”? If you haven’t, you might be surprised to learn that, in a way, we all begin our lives like this. The idea that ...

Frozen embryos are filling storage banks around the world. It's a struggle to know what to do with them. Lisa Holligan already had two children when she decided to try for another baby. Her first two ...