space time

What can cause a ripple in both space and time? Neutron stars colliding. And what can observe that phenomenon? A two-mile-long laser.

This discovery finally points to the source of Earth's precious heavy elements, also proves Einstein correct in more ways than one. 

These scientists scooped up the Nobel by detecting a ripple in space-time.

Physics finds no trace of God so far—but does it matter?

Time is this wild fourth dimension in nature, says Bill Nye. We depend on its neat measurements for survival – but subjectively it continues to elude us.

Physicists' ideas about the nature and existence of time may seem incongruent with our experience of it, but author James Gleick makes a case for why we need to keep an open mind.

Bill Nye is always dressed for a party, but this time his celestial bow-tie pays respect to one of our era's greatest discoveries: gravitational waves.