General Relativity

In 1993, Canadian physicist Matthew Choptuik demonstrated black holes may emerge spontaneously from critical collapse, during which spacetime…

In a surprising paper from 2021, scientists Alexey Bobrick and Gianni Martire suggested that they’d nailed down a…

When two black holes crash together, the violence does not end at impact. The newly formed black hole…

Artistic depiction of the darkness measurement. Image not to scale. Physicists have experimentally confirmed a strange prediction: the…

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Scientists have tested gravity across some of the largest structures in the universe and found that it behaves…

Albert Einstein is probably one of the most well-known people in human history. Not just one of the…

One of the greatest unsolved problems in physics concerns unifying quantum mechanics and general relativity—two equally successful theories…

In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used…

Andromeda sounds far away because 2.5 million light-years sounds far away. It lands with authority. It feels exact.…

Between May 2023 and January 2024, a global network of gravitational-wave detectors picked up 128 new cosmic signals,…

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A Strange Black Hole Mystery Has Stumped Physicists Since 1993. Researchers May Finally Have the Answer