Fidelity's Contrafund marked down its biggest stake in Space X-rival Relativity Space by around 21%, from $22.83 a share to $17.96.

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.

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the ...

In 2015, the general theory of relativity will be 100 years old. In November 2015, Albert Einstein gave weekly lectures to the Prussian Academy of Sciences in which he set out the fundamental field ...

Relativity Space uses giant 3-D printers to produce components for its Terran rockets. (Relativity Space Photo) Relativity Space, the startup that was founded in Seattle and is now building 3D-printed ...

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 ...

Matthew Mewes is in the Department of Physics, College of Science and Mathematics, California Polytechnic State University, San Luis Obispo, California 93407, USA. The IceCube Collaboration instead ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. When we think about Einstein and the theory of relativity, all sorts of ...

California-based startup Relativity Space is one of many launch startups, but it stands out for its 3D-printing approach to manufacturing rockets while also pursuing fully reusable rockets. Relativity ...

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

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 ...