Physicists artificially slowed down time to reveal the bizarre Terrell-Penrose effect, a consequence of special relativity. This image from the experiment shows a sphere seemingly moving at 99.9 ...

New Analysis of Gravitational-Wave "Dark Sirens" Reveals Tension with General RelativityHONOLULU, Feb. 13, 2026 / PRZen ...

Scientists hope to probe the nature of general relativity through a possible pulsar found in the center of the Milky Way, ...

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

A record-breaking gravitational wave signal let scientists "listen" to a distant black hole merger and put Einstein's gravity to its toughest test yet.

Researchers from Columbia University and Breakthrough Listen, a scientific research program aimed at finding evidence of ...

Einstein’s theory of relativity has explained the universe for more than a century. But under certain conditions, cracks begin to appear. Physicists have identified a gap Einstein never had the tools ...

3D-printing rocket builder Relativity Space closed a $500 million round of new capital which CEO Tim Ellis said now gives the company a "war chest" to further advance its technology. "This really ...

3D-printing specialist Relativity Space is building a second rocket factory in Long Beach, California, where the company will move its headquarters. At more than 1 million square feet, the former ...