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origins of life

Kepler planetary disk

Space

‘Alien megastructure’ star may host Saturn-like exoplanet

Rather than being caused by extraterrestrial construction, the bizarre dimming of Tabby’s star could instead be due to a closely orbiting, ringed planet

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Futuristic city

Space

Science fiction picks: Time for a reality check

Culture

Titan

Space

Building blocks of alien cells found on Saturn’s largest moon

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Foggy background forest with outline of child in the foreground

Physics

Aliens slumbering for billions of years are out there – really?

Comment

Mars rover wheel tracks

Life

The best way to detect aliens may be by finding their footprints

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A possible view on an alien world: mountaintops poking through mist and two suns visible in the sky

Space

The exoplanet zoo – a whistle-stop tour

Features

surface of Mars

Life

The ethics issue: Should we colonise other planets?

Features

Very Large Array radio telescope

Space

Messages from fake aliens decoded quickly in online SETI contest

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Mars strata

Life

Mars rover sees signs of microbe-friendly layers in ancient lake

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meteorites landing on early Earth

Space

Microbes might thrive after crash-landing on board a meteorite

Some extremophile bacteria could survive the a crash-landing of a meteorite or spacecraft, helping them travel between worlds

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Life

Odds on: 10 science breakthroughs you can bet on

Features

Space

Martian life must be rare as free energy source remains untapped

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Life

We still haven’t heard from aliens - here’s why we might never

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Space

The five best exoplanets in the galaxy to check for alien life

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