Quanta

A 150-year-old conundrum about how to group people has been solved, but many puzzles remain.

Quantum theorist Christopher Fuchs explains how to solve the paradoxes of quantum mechanics. His price: physics gets personal.

One of the greatest mysteries in physics could be solved by a mattress-like axion field that permeates space and time.

When a legendary mathematician found a mistake in his own work, he embarked on a computer-aided quest to eliminate human error. To succeed, he has to rewrite the century-old rules […]

Physicists are beginning to unravel the mysteries of ultrahigh-energy cosmic rays, particles accelerated by the most powerful forces in the universe.

Researchers build the world’s largest evolutionary tree and conclude that species arise because of chance mutations — not natural selection.

Brian Swingle was a graduate student studying the physics of matter at the Massachusetts Institute of Technology when he decided to take a few classes in string theory to round out […]

A bold new idea aims to link two famously discordant descriptions of nature. In doing so, it may also reveal how space-time owes its existence to the spooky connections of […]

The computer scientist Stuart Russell wants to ensure that our increasingly intelligent machines remain aligned with human values.