The age-old debate of whether the chicken or the egg came first is explored through historical and evolutionary contexts.

What came first, the chicken or the egg? If we’re talking about eggs in general, then the latter, but a new study of an ancient single-celled organism suggests the genetic tools to “create” eggs may ...

A chick emerges from an egg after three weeks (21 days) of incubation. Soon after incubation begins, a pointed, thickened layer of cells becomes visible in the tail end of the embryo.

Technically, the chicken that we know today came about after our amniote pals switched to laying hard-shelled eggs. Regardless of if the chicken or egg came first, these researchers have peeled ...

Real-time visualization of chick embryo development from egg to chick. University of Tsukuba. Journal Scientific Reports DOI 10.1038/s41598-024-72004-y ...

A new system could keep those chicks from ever existing, by analyzing the scent of eggs to ascertain the sex of the embryo inside. There are already two main methods of sexing unhatched chicken ...