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How a radical redefinition of life could help us find aliens

Life

How a radical redefinition of life could help us find aliens

Sara Imari Walker, who developed Assembly Theory with chemist Lee Cronin, explains how the theory's definition of life might help us find it on other planets

Features

Environment

UK and Ireland suffer one of the most severe marine heatwaves on Earth

News

Humans could bring microbes into space

Space

Space germs: How can we avoid contaminating other worlds?

News

Environment

'Doomsday' glacier in Antarctica isn't as vulnerable as feared

News

Life

1.6-billion-year-old steroids may be traces of earliest complex life

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The Allen Telescope Array

Space

Fake alien message sent to Earth to prepare us for first contact

News

Why sending messages to extraterrestrials is controversial

Space

Why sending messages to extraterrestrials is controversial

Comment

Environment

Ozone layer treaty pushed back ice-free Arctic summers up to 15 years

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Life

The hunt for the South Island kōkako, New Zealand’s long-lost bird

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Life

Why the origins of life remain a mystery – and how we will crack it

To explain how life on Earth began, the big challenge is to identify the molecules and processes that enable non-living chemical systems to become more complex

Features

Environment

Antarctic ice melt may be reversible due to rising land beneath

News

Life

Surprising culprit found that killed 95% of a sea urchin population

News

Life

Kelp forests capture nearly 5 million tonnes of CO2 annually

News

Space

What are the prospects for life on the icy moons Europa and Enceladus?

News