Physics

The Advanced Laser Interferometer Gravitational-Wave Observatory’s third detection further compounds the mystery of why black holes collide.

Join David Kaplan on a virtual-reality tour showing how the sun, the Earth and the other planets came to be.

A series of observations at the very edge of the universe has reignited a debate over what lifted the primordial cosmic fog.

Time isn’t just another dimension, argues Tim Maudlin. To make his case, he’s had to reinvent geometry.

A system of seven Earth-like exoplanets appeared to be unstable. Now their orbits have been rewritten in the music of the spheres.

As physicists extend the 19th-century laws of thermodynamics to the quantum realm, they’re rewriting the relationships among energy, entropy and information.

Angela Olinto’s new balloon experiment takes her one step closer to the unknown source of the most energetic particles in the universe.

After a surprise discovery, astrophysicists are racing to understand superenergetic flashes of radio waves that sometimes beep out from distant galaxies.

Physicists are attempting to map the distribution of the prime numbers to the energy levels of a particular quantum system.