Physicists are quietly testing an audacious idea: that the mass of everything around us might not come from an invisible field, but from the hidden geometry of space itself. Instead of treating extra ...

LAST month, I wrote about the challenge of explaining space-time. To give people a feeling for what I mean when I say that space-time is curved, sometimes I talk about a rubber sheet with a ball ...

Gravity across Earth is pretty reliable. Drop a ball on the ground in England, fly to Australia, and drop the ball again, and you will find they fall to the ground at pretty much the same rate. But we ...