The hormone irisin, promising as a therapeutic against Alzheimer’s and dementia, is responsible for the cognitive benefits of exercise.

Charles Duhigg unpacks how individuals and organizations work at war, on Wall Street, and in Silicon Valley

Can election reforms end the crippling gridlock in American politics?

A nineteenth-century advertising medium traces the rise of consumer culture.

Emily Balskus deciphers the human microbiome.

Michael Sandel makes the case against meritocracy.

An ambitious oral-history project captures the lived experiences of alumnae.

The “yeasty” times” when computer research grew at Harvard