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Physics3781 articles archived since 1845

What Is a Light-Year?

Do you know what it is that a light-year actually measures? Do you know why so many people find it confusing? And why they really shouldn’t?

4 hours ago — Math Dude Jason Marshall

Dogs Teach Bomb-Sniffing Machines New Tricks

A dog’s sniff pulls a plume of fresh scents toward them, which fluid dynamicists say is a technique that could make for better bomb detectors. Christopher Intagliata reports.

December 2, 2016 — Christopher Intagliata

Gravitational Waves Discovered from Colliding Black Holes

On February 11, 2016, scientists announced that a daring experiment had finally confirmed Einstein's 1916 prediction of gravitational waves. That day Clara Moskowitz explained why the discovery promises to open a new era in astrophysics

December 1, 2016 — Clara Moskowitz

Tangled Up in Spacetime

Hundreds of researchers in a collaborative project called “It from Qubit” say space and time may spring up from the quantum entanglement of tiny bits of information

October 26, 2016 — Clara Moskowitz

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