Being Human

The body and the mind don’t have to be such mysteries.

Illustration by Lucy Naland. Sources: Michael Siluk / UCG / Universal Images Group / Getty; Paul Harding / Getty.

Are GLP-1s Performance-Enhancing Drugs?

A weight-loss medication eased Serena Williams’s comeback. Experts can’t agree on whether that counts as doping.

Louise Bestea / Smithsonian Tropical Research Institute

The Butterfly Longevity Diet

Researchers aren’t sure why Heliconius butterflies live so long, but pollen may be part of the answer.