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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

The crater and its extremely harsh lake, Laguna Caliente, dominated by a single genus of extremophile Acidiphilium bacteria

Space

Bacteria survive extremes that may have existed in ancient Mars lakes

News

Dressed in a spacesuit which is a replica of the one worn by Tim Peake on his mission to the International Space Station

Space

Project Hail Mary review: Andy Weir conjures a new tale of space peril

Culture

Why icy moons like Europa are our best bet for finding alien life

Life

Why icy moons like Europa are our best bet for finding alien life

Features

Asteroid over Earth

Space

Have we really found an alien protein inside a meteorite?

Analysis

life artwork

Life

Why the hunt for alien life is under way far beneath Earth's surface

Features

Moving to Mars – this show will help you become a real Martian

Technology

Moving to Mars – this show will help you become a real Martian

Culture

Artist's impression of a brown dwarf

Space

Microbial life might drift in the atmospheres of failed stars

News

night sky artwork

Space

Are there any aliens out there? We are close to knowing for sure

Features

Martian landscape

Space

Water on Mars is probably too cold and salty for life as we know it

Even if there is water on Mars’s surface it may be too cold and salty for life as we know it to survive there – so there is no risk of contaminating Mars with Earth microbes

News

Space

Thousands of Elite Dangerous players embark on epic space voyage

Culture

Video

Lewis Dartnell: Astrobiology – the search for alien life

Video

Space

The Martians have landed in London, and they're hogging the camera

Culture

Space

Massive lake of water found beneath Mars’ south pole could host life

News