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General relativity

The international space station

Physics

Ultracold atoms in space will let us stress test Einstein’s relativity

Potassium and rubidium atoms aboard the International Space Station have been cooled almost to absolute zero to put a fundamental principle of Einstein鈥檚 general theory of relativity to the ultimate test

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Physics

Is space-time quantum? Six ways to unpick the fabric of the universe

Features

Physics

Can recreating black holes in the lab solve the puzzles of space-time?

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Quantum particles, quantum computer, galaxy-like ; Shutterstock ID 2194720327; purchase_order: -; job: -; client: -; other: -

Physics

How we could discover quantum gravity without rebuilding space-time

Features

Physics

Do we live in a hologram? Why physics is still mesmerised by this idea

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Physics

Will artificial intelligence ever discover new laws of physics?

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Black holes

Space

Black holes wobbling three times a second have proved Einstein right

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CNES Satellite Illustration

Physics

Einstein’s gravity principle still correct, finds most precise test

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Across the universe. Traveling in space. Time travel. Elements of this image furnished by NASA.; Shutterstock ID 200832383; purchase_order: -; job: -; client: -; other: -

Space

Why general relativity is known as a background independent theory

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6 Will we ever unite physics? The infinite time is circulating in the universe, 3D illustration; Shutterstock ID 498879817; purchase_order: -; job: -; client: -; other: -

Physics

Will we ever unite physics? Clocks in superposition could offer clues

Physicists have long sought to marry general relativity and quantum mechanics 鈥� now some reckon experiments that probe the way each theory treats time could finally make it happen

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Physics

Hot plasma mirror may help solve Stephen Hawking鈥檚 black hole paradox

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Space

First picture of our galaxy鈥檚 supermassive black hole revealed

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Physics

Most precise atomic clock shows Einstein鈥檚 general relativity is right

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Space

We鈥檝e seen our galaxy鈥檚 huge black hole more clearly than ever before

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