Time feels like the most familiar thing in the world, yet it hides one of physics’ hardest questions: why do we only remember ...

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.

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

Relativity Space Inc. co-founder Tim Ellis wanted to revolutionize the rocket industry with 3D printing. He persuaded big-name investors from BlackRock Inc. and Fidelity Investments to Mark Cuban and ...

Relativity Space plans to launch its new reusable, 3D printed rocket Terran R by 2024. The company has just raised funds in a round led by Fidelity.

A splashy California-based launch company named Relativity Space shared a photo of sleek-looking rocket hardware on its social media channels last week. The image featured an impressively large ...

Former Google Chief Executive Eric Schmidt is the new chief executive of Long Beach based Relativity, which aims to compete with other rocket companies. Leader: New Relativity CEO Eric Schmidt. (Photo ...

When black holes collide, the impact radiates into space like the sound of a bell in the form of gravitational waves. But ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Albert Einstein's theory of general relativity has held up pretty well after a century out in the ...

Einstein put forth special relativity, which explains motion at near-light speeds. Although there are many consequences of Special Relativity, this complex theory consists of only two postulates, both ...

When the theory of relativity appeared in the early 1900s, it upended centuries of science and gave physicists a new understanding of space and time. Isaac Newton saw space and time as fixed, but in ...

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 ...