Egg whites may be perfect for a health-conscious breakfast, but egg yolks turned out to be the key ingredient for cultivating bird embryonic stem cells (ESCs) in the lab. Using a growing medium of egg ...

The avian egg is an evolutionary marvel. Easter brought egg-dying and egg hunts. A lot of fun for the kids but not what the chickens had in mind. Fish and amphibian eggs are soft and unshelled and ...