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immune system

Cosmic accidents: Mars attacks

Space

Cosmic accidents: Mars attacks

A colossal interplanetary collision doesn't sound like a good thing – but without it, things might have turned out very differently

Features

Cosmic accidents: Sparking up our star

Space

Cosmic accidents: Sparking up our star

Features

Solved: mystery of the meteor-shedding asteroid

Space

Solved: mystery of the meteor-shedding asteroid

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Mars moon may have formed like our own

Space

Mars moon may have formed like our own

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Crater map rekindles debate over moon impacts

Space

Crater map rekindles debate over moon impacts

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Did Jupiter and Saturn play pinball with Uranus?

Space

Did Jupiter and Saturn play pinball with Uranus?

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Found: natural bridges on the moon

Space

Found: natural bridges on the moon

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Space

Trojan asteroids make planetary scientist lose sleep

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Weird water lurking inside giant planets

Space

Weird water lurking inside giant planets

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Second super-fast flip of Earth's poles found

Earth

Second super-fast flip of Earth's poles found

Theory says the Earth's magnetic field can't flip in just a few years, yet for the second time evidence has been found of it happening in the past

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Earth

Sunspots squeeze and stretch the day

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Space

Jupiter attacked for third time in 13 months

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Space

Solar system slips back in time

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Space

Shrinking moon may explain lunar quakes

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