After watching that, I joked with a friend that the gravity we feel every day is actually a result of space-time being ...

The concept of time travel, filled with magic, has long danced on the boundary between science and science fiction. From ...

When LIGO detected gravitational waves unleashed from two colliding black holes for the first time in science history, it set ...

Contents -- Acknowledgments -- Preface -- Dreaming of time travel -- Time travel to the future -- Time travel to the past -- Time travel and the beginning of the Universe -- Report from the future -- ...

Ten years ago, scientists heard the universe rumble for the first time. That first discovery of gravitational waves proved a ...

GPS satellites experience time differently than we do on Earth. Without compensating for this strange effect predicted by ...

Einstein proposed and published his theories of special and general relativity in 1905 and 1915. The concepts are monumental ...

Einstein’s Theory of General Relativity, an immensely important update to Newton's Law of Universal Gravitation, is currently ...

In the moments before the Big Bang, our universe was a hot, dense, and extremely high-energy place. That all changed when the universe exploded 13.8 billion years ago. Rapid inflation divided a single ...

Faster-than-light travel is impossible according to our current understanding of physics. Wormholes are theoretically possible but require unstable, exotic matter to stabilize. Generation ships are a ...

Astronomers detected in unprecedented detail a collision between two black holes. Their observations confirm predictions made by Albert Einstein and Stephen Hawking.