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Physics

Why quantum mechanics says the past isn’t real

The famous double-slit experiment brings into question the very nature of matter. Its cousin, the quantum eraser experiment, makes us question the very existence of time – and how much we can manipulate it

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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

Soyuz-2.1 rocket booster with Soyuz MS-28 space ship

Space

What would Russia's inability to launch crewed missions mean for ISS?

Analysis

Plasma ball, conceptual illustration.

Space

Why dark matter is still one of the biggest open problems in science

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Space

Astronomers may have glimpsed evidence of the biggest stars ever seen

News

The 19 best Christmas gifts for science lovers (and nerds)

Technology

The 19 best Christmas gifts for science lovers (and nerds)

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Physics

The fascinating story of the ultimate cosmic law

Comment

Space

We may have found a surprisingly nearby cluster of primordial stars

News

The best new science fiction books of November 2025

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The best new science fiction books of November 2025

Culture

CMB-S4 will use telescopes installed at the South Pole to measure variations in the temperature and polarization of microwave light across most of the sky to probe for ripples in space-time. Shown here is the South Pole Telescope. Photo: Brad Benson, University of Chicago, Fermilab

Space

The end of US support for the CMB-S4 telescope is devastating

The US government's decision to stop supporting a telescope facility that would have given us unprecedented insight into the early universe is calamitous, says Chanda Prescod-Weinstein

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Earth

How worried should we be about noxious chemicals from dead satellites?

Features

Space

See the beauty of space, captured by the astronauts who experienced it

Regulars

Space

Is the universe really one big black hole?

Comment

Space

Do black holes exist and, if not, what have we really been looking at?

Features