From Newton’s falling apple to Einstein’s curved spacetime, our understanding of gravity has come a long way, yet this familiar force remains one of the biggest puzzles in physics.

A preference for "universal masses" 9 and 16 times the mass of our Sun have been identified in the gravitational-wave events detected so far. When you purchase through links on our site, we may earn ...

It's fun to think about how we know stuff. For instance, the sun has a mass of about 2 x 10 30 kilograms. That is such an enormous mass that it's difficult to comprehend. And if it's so difficult for ...

For a long time, scientifically-minded folks (or at the very least, proto-scientific philosophers) assumed that the rules that governed our daily lives here on poor old Earth were radically different ...