Early arrivals: the first four images of the gravitationally lensed supernova are shown in yellow. (Courtesy: NASA/ESA/JHU/UCLA/UC Berkeley/STScI) A study of how light from a distant supernova was ...

There was a secret inside the envelope in the hands of Stephan Schlamminger, one of the world’s leading experts in experimental tests of gravity. He appeared to be on the verge of opening the envelope ...

An analysis of the jumps of a hydrogen atom’s electron has yielded a new, precise value for the Rydberg constant, a fundamental quantity in physics 1. The Rydberg constant is related to hydrogen’s ...

The Planck mission gave us the most precise value of the Hubble constant to date by measuring the cosmic microwave background. But studies made since using different methods provide different values.

A crucial number that rules the universe goes big in a strange quantum material. The fine-structure constant is about 10 times its normal value in a type of material called quantum spin ice, ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A fundamental constant of the universe may not be soconstant after all, according to a new study.

One of the fundamental constants that underpins physics has not changed as the Universe has evolved, according to a new analysis. The result is in sharp contrast to similar recent research suggesting ...

IT IS a well-kept secret, but we know the answer to life, the universe and everything. It’s not 42 – it’s 1/137. This immutable number determines how stars burn, how chemistry happens and even whether ...