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NIST scientists Stephan Schlamminger (left) and Vincent Lee examine the torsion balance they used to measure the gravitational constant, big G

Physics

Gravity's strength measured more reliably than ever before

Measuring the strength of gravity is extraordinarily difficult, and different experiments have always disagreed – but a new test is paving the way to finally understanding nature’s most enigmatic force

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Physics

The stunning physics of Project Hail Mary go back to ancient China

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Astronaut running during sunset at a remote planet

Health

How working out like an astronaut can reduce back pain and slow ageing

Features

The experiments that could finally explain gravity

Video

The experiments that could finally explain gravity

Video

Are we living in a simulation? This experiment could tell us

Physics

Are we living in a simulation? This experiment could tell us

Features

An artwork made my layering many paper cutouts, showing an astronaut near a black hole. Within the black hole are colourful swirls, stars and specks

Physics

Black hole entropy hints at a surprising truth about our universe

Features

A new understanding of causality could fix quantum theory’s fatal flaw

Physics

A new understanding of causality could fix quantum theory’s fatal flaw

Features

Space

Lumpy ‘caterpillar wormholes’ may connect entangled black holes

News

No space, no time, no particles: A radical vision of quantum reality

Physics

No space, no time, no particles: A radical vision of quantum reality

Features

Physics

Could gravity produce quantum entanglement if it’s not fully quantum?

Upcoming experimental tests of gravity’s quantumness aim to resolve one of the biggest questions in physics, but theorists are finding that the issue may be even more complex than they thought

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Physics

The 30-year fight over how many numbers we need to describe reality

Features

Physics

Is gravity a new type of force that arises from cosmic entropy?

Features

Physics

Laws of quantum physics may rule out a universe that came before ours

News

Physics

The radical idea that space-time remembers could upend cosmology

Features