Physics

How time travel might explain some of science’s biggest puzzles.

If the constitution of nature itself were changing in time, how would you know?

To John Archibald Wheeler, the race to explain time was personal.

A bird’s-eye view on life and the universe.

What happened before the Big Bang?

Is a third-act twist to nuclear energy at hand?

Can information ever be rescued from inside a black hole?

Want to see evidence of other universes? Just look up.

In the search for subatomic particles, it helps to know what you’re looking for.