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Geraint Lewis at 51�� Live 2019

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The search for aliens: Is anybody out there?

Intelligent life in the universe seems to be vanishingly rare. Astrophysicist Geraint Lewis reveals our odds of us ever meeting aliens

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Imagined Mars settlement

Space

Should SpaceX be allowed to contaminate Mars with Earth microbes?

Insight

Inflatible green Aliens standing in line

Life

Alien life could be weirder than our Earthling brains can ever imagine

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mammoth skeleton in museum

Life

Extinction is a fact of life. Could we stop it – or even reverse it?

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killifish

Life

Predators may make prey get smart and grow more brain cells

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Avi Loeb

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When will we hear from aliens? We may already have done so

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Liz Bonnin at 51�� Live

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The problem with plastic - and how science can solve it

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How to solve our plastic waste problem

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How to solve our plastic waste problem

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Javier Martin-Torres

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Life on Mars: Could we build a home on the Red Planet?

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Javier Martin-Torres

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Life on Mars: Could we build a home on the Red Planet?

Is Mars habitable? Was it ever? And what of the future? Javier Martin-Torres is finding out

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Fighting plastic pollution in British waters: How to make a difference

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Join a virtual 6000km trek across the deep ocean

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Sea sums: How we're keeping whales safe using maths

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Life

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

Features