For a few years, one of particle physics’ most unsettling numbers seemed to be pointing somewhere strange. The trouble centered on the W boson, a heavy particle that carries the weak force, one of ...

This morning on BBC Radio 4, the mathematician Roger Penrose, physicist Basil Hiley, and philosopher Simon Saunders had a lively discussion about the “measurement problem in physics” with broadcaster ...

After a 10-year effort, physicists got a value for “Big G” that does not settle the debate over one of nature’s hardest ...

In the last few weeks I've been working on a slightly more formal version of this post on black-body radiation for use in something else. One of the tricky things in writing about the development of ...

Scientists working on Fermilab's Muon g-2 experiment released the world's most precise measurement yet of the magnetic moment of the muon, bringing particle physics closer to the ultimate showdown ...

A decade-long effort to measure one of physics’ most fundamental constants culminates in a moment of uncertainty and ...

From pacing out distances with our feet to defining the kilogram by the Planck constant, measurement has come a long way. Across history, humans have sought consistent ways to compare, quantify, and ...

“It’s not maths that makes physics a science. It’s the fact that you measure things,” says Michael de Podesta in this week’s Physics World Weekly podcast. De Podesta is in conversation with Physics ...

Recently in my physics lab, students were having trouble with the difference between mass and weight. I had ready answers---it’s a topic I’ve gone over hundreds of times. But after I explained that ...