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 ...

Relativity Space says it’s brought in another $500 million in investment to speed up its effort to build entire orbital-class rockets using 3D printing. The startup — which was founded in Seattle less ...

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

In this last part of our series on recently digitized books from the Wenner Collection, we are focusing on works that ...

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

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

James Yenbamroong, CEO of mu Space, and Tim Ellis, CEO of Relativity, pose with employees upon signing a contract to launch a mu Space satellite on Relativity's Terran 1 rocket in 2022. Credit: ...

For decades, the supermassive black hole at the center of the Milky Way was an invisible monster, betrayed only by the way ...

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