It's well known that spaceflight causes muscle atrophy and other biological changes in reduced gravity, and especially in ...

Theoretical physicists have spent decades wrestling with a disorienting possibility: that the flow of time is not woven into ...

A new data release more than doubles the number of gravitational-wave candidate events—and reveals unexpected complexities of merging black holes ...

Time has an arrow: It only ever seems to move in one direction. The future is always unknown to us, while the past forever remains locked and inaccessible. And yet, the vast majority of the laws of ...

How does fine dust aggregate into building blocks that ultimately form entire planets like our Earth? A research team led by ...

The Sun is not nailed to the center of the solar system. It moves, wobbles, and traces a small loop through space, tugged by ...