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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 ...

It feels so obvious that time moves forward that questioning it can seem almost pointless.

Quasicrystals are orderly structures that never repeat. Scientists just showed they can exist in space and time.

What: Researchers report the possible discovery of a millisecond pulsar near the Galactic Center using data from the ...

The universe has delivered the loudest gravitational wave ever recorded, and it appears to have given Einstein’s theory of general relativity one of i.

Pulsars are a special class of neutron stars that spin very quickly on their axes, releasing pulses of radio waves. These beats are so precise that pulsars are only beaten as accurate clocks by some ...

Astronomers suspect the heart of the Milky Way may be hiding a big secret: a rapidly spinning, highly magnetic, neutron ...

Albert Einstein’s timeless wisdom highlights the power of imagination in driving innovation and discovery. In a world ...

A new computational simulation of the early universe has revealed a fundamental, unbreakable geometric limit to the fabric of spacetime, dubbed the "Metric Wall." Discovered by independent physics ...

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.