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91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Lost in Space-Time

Each month, we hand over the keyboard to a physicist or mathematician to tell you about fascinating ideas from their corner of the universe. You can sign up to the Lost in Space-Time newsletter here.
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Soyuz-2.1 rocket booster with Soyuz MS-28 space ship

Space

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

Russia's only launch site capable of sending humans to orbit has suffered serious damage that may take two years to fix. Will NASA keep supporting the ISS without Russian involvement, or is this the end for the space station?

Analysis

Plasma ball, conceptual illustration.

Space

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

Comment

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)

Comment

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

Comment

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

Comment

Physics

Ultracold atoms could test relativity in the quantum realm

News

Satellite-filled sky

Earth

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

We have more satellites than ever before, but when they burn up they create a new kind of air pollution. Evidence is now revealing what effects this could have and how to tackle it

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

Physics

Ultracold clocks could reveal how quantum physics alters time

News

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