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Telltale chemistry could betray ET

Earth

Telltale chemistry could betray ET

Alien life may be hard to find because it's fundamentally unlike that on Earth – but a tendency to chemically alter its environment may give it away

News

What if the Earth stopped spinning?

Earth

What if the Earth stopped spinning?

Features

Space

Solar eclipse to ring in new year

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Space

Did 'Martian' methane signal come from Earth?

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Don't send bugs to Mars

Life

Don't send bugs to Mars

Comment

Giant ice volcano may have been found on Titan

Space

Giant ice volcano may have been found on Titan

News

Geminid meteors set to dazzle

Space

Geminid meteors set to dazzle

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Space

Probe fails to orbit Venus and flies into space

News

Saturn's strange propellers show how planets are born

Space

Saturn's strange propellers show how planets are born

Features

Space

Space debris may cause mysterious ball lightning

A strange, bouncing orb of light seen by an Australian farmer in 2006 was triggered by a meteor, a new study suggests

News

Space

Experiment casts doubt on origins of lunar water

News

Life

Hardy bugs could survive a million years on Mars

News

Space

Comet caught throwing basketball-sized snowballs

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Space

Former 'tenth planet' may be smaller than Pluto

News