Einstein’s Theory of General Relativity is currently our best approximation of how the universe ticks. But there are holes.

See how Relativity's Terran 1 rocket got from the 3D printer to the launch pad in these highlights. Credit: Relativity Space ...

The universe’s accelerating expansion has long puzzled physicists. For decades, dark energy, an unseen force thought to make ...

Quantum mechanics and relativity are the two pillars of modern physics. However, for over a century, their treatment of space ...

Our universe plays by certain rules, which originate from different branches of physics. But sometimes the rules seem ...

Einstein's theory of general relativity, published in 1916, built upon his earlier work, including special relativity and the mass-energy equivalence, both published in his "Annus Mirabilis" in 1905.

Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

Why can't anything travel faster than the speed of light? Do black holes really suck? And why is the universe expanding? These are just a few of the questions author and astrophysicist Jeffrey Bennett ...