Men have nipples because embryos are sexually neutral for their first six weeks. Here's the developmental blueprint behind ...

The last 40 years have witnessed a deep transformation in our views of animal development. From seeing development a multicellular black box where over time a mass of cells acquires shape to form ...

The absence of maternal pre-patterning in killifish embryos may offer a survival advantage, preventing the accumulation of damaged cells during dry seasons or the loss of body structure information.

An international research team has made a notable discovery of fossil embryos belonging to Ecdysozoa, a diverse group of animals including roundworms, velvet worms, insects, and crabs. These fossils, ...