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water-rich asteroid

Space

Earth may have formed with enough water to fill the oceans three times

A fresh look at the type of space rocks thought to have formed our planet suggests they contain more water than we thought, indicating early Earth was very wet

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Strange lightning on Jupiter may be caused by ammonia snowballs

Space

Strange lightning on Jupiter may be caused by ammonia snowballs

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Devon island

Space

Ancient valleys on Mars may have been carved by glaciers

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Sectioned fragment from an iron meteorite that caused the Odessa crater in Texas, US, about 50,000 years ago

Definition

Iron meteorites

Martian surface

Space

Electric dust could be erasing signs of life from the surface of Mars

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Some hot giant planets get larger as they are heated by their stars

Space

Some hot giant planets get larger as they are heated by their stars

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Mud volcano

Space

Mars may be covered in mud volcanoes disguised as lava flows

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Surface of Mercury

Space

A large chunk of Mercury may have been blown away by the sun

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Planet Nine

Space

Mysterious ‘Planet Nine’ on the solar system’s edge may not be real

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A giant raft of rock may once have floated across Mars’s ancient ocean

Space

A giant raft of rock may once have floated across Mars’s ancient ocean

Mars could have had an ancient ocean in its northern hemisphere, and a large raft of volcanic rock may have floated across it to settle into mounds we can see today

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Space

Vast worlds called brown dwarfs have extraordinarily powerful winds

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Space

Venus may have an underground magma ocean spanning the whole planet

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Space

Pluto formed quickly with a deep ocean covering its entire surface

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Space

Strange lines on Venus may be folded stacks of lava eroded by wind

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