development

A painstaking study of wing morphology shows both the striking uniformity of individuals in a species and a subtle pattern of linked variations that evolution can exploit.

The molecular signaling systems of complex cells are nothing like simple electronic circuits. The logic governing their operation is riotously complex — but it has advantages.

Don’t be misled by the bloodthirsty names of immune cells. Mounting research shows that the cells also fine-tune tissues and help the body heal.

Neuroscience has found that gestures are not merely important as tools of expression but as guides of cognition and perception.