Some of the hardest questions in cosmology begin where the usual math gives up. Push Einstein’s theory far enough back toward ...

The revised version of the Terran R features increased performance, but will only reuse the first stage. Credit: Relativity Space WASHINGTON — Relativity Space has decided to retire its Terran 1 small ...

Update, 3:45 pm ET: Relativity Space got to within 70 seconds of launching the Terran 1 rocket Wednesday before it halted the countdown due to an “out of bounds” temperature reading for methane in the ...

General relativity has withstood perhaps its toughest challenge to date. The theory, which Albert Einstein published in 1916, revolutionized our understanding of physics and the cosmos. It explains ...

Relativity Space co-founder Jordan Noone, seen here with one of the company's 3-D printers used to produce launch vehicle components, is stepping down as the CTO as he prepares to launch a new startup ...