In a species of freshwater turtle, embryos can move toward warmer or cooler environments within the egg and thus help choose their sexual destiny, but not all experts are convinced.

Researchers track which genes are active in the polyp during successive cell states.

Maternal care for the fish alters the structure of their developing heads.

See a developing Drosophila eye.

Eaton studied morphology and growth during development at the Max Planck Institute of Molecular Cell Biology and Genetics.

The connectomes trace 385 neurons in the male worm and 302 neurons in the hermaphrodite worm.

Human embryonic stem cells differentiate and organize themselves on a chip.

The research may necessitate the formation of new ethical guidelines.

Researchers study how oxygen around an embryo helps shape the way feet and digits form in amphibians and chickens.