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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

Life

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

News

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

Life

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

News

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Life

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

Features

Long spined sea urchins underwater on seabed of the Caribbean sea

Life

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

News

Giant kelp (Macrocystis pyrifera) grows in a thick, underwater forest near the Channel Islands in California. This area is part of a National Park and is teeming with thousands of marine species.

Life

Kelp forests capture nearly 5 million tonnes of CO2 annually

Towering underwater kelp forests generate a potential value of $500 billion each year by providing a boost to commercial fishing, as well as nitrogen and carbon removal

News

Space

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

News

Life

Mysterious deep-sea holes may be burrows of tiny shrimp-like creatures

News

Life

How did multicellular life evolve? Algae and yeast give some hints

Comment

Earth

Oxygen on early Earth may have come from quartz crushed by earthquakes

News