Scientists have uncovered a surprising genetic shift that may explain how animals with backbones—from fish and frogs to ...

Early in development, many animals pick a team—male or female—based on their genetics, and, with time, acquire the ...

A duplicated gene evolved into a switch that determines sex in frogs, revealing how evolution can safely reshape critical ...

A new study has uncovered a hidden step that helps the deadliest malaria parasite survive and multiply inside the human body.

Researchers mapped early brain growth from mid-pregnancy to the first month after birth and found signs that sex-linked differences emerge surprisingly early.

Standards make everyday life run smoothly. You rarely notice them: the credit card that works in any corner of the world, the Wi-Fi signal that connects a remote village to the cloud, or the vaccine ...