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Earth was smashed by a rock the size of Mars to make the moon

Space

Earth was smashed by a rock the size of Mars to make the moon

4.5 billion years ago, a rock called Theia crashed into Earth and formed the moon. Now we know that it was probably only about a tenth the mass of our planet

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Mars

Space

Mars rocks may have drunk up all the water and doomed life there

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Mercury probe

Space

2018 preview: Epic mission to Mercury will unravel its mysteries

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An underweight newborn baby

Health

The body’s killer immune cells also feed fetuses in the womb

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Planet X artwork

Space

Planet X: We are closing in on the solar system's new occupant

Features

That interstellar asteroid could be a shard of a shredded planet

Space

That interstellar asteroid could be a shard of a shredded planet

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art work of Neptune and Triton

Space

Neptune’s other moons were normal until Triton crashed the party

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Enceladus’s hot, gritty core may cook up ingredients for life

Space

Enceladus’s hot, gritty core may cook up ingredients for life

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We now know more on the origins of weird duck-shaped comet 67P

Space

We now know more on the origins of weird duck-shaped comet 67P

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Boiling water on Mars could make the planet's sand levitate

Space

Boiling water on Mars could make the planet's sand levitate

In Martian summer, the combination of warm temperatures and a thin atmosphere make any liquid water on the surface boil, which can let dust hover across the ground

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Space

We may have just seen the first comet from another solar system

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Humans

Luther's legacy: Did a religious revolt create science?

Features

Space

A 300-kilometre space rock has vanished since we saw it in 1995

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Space

Volcanoes that spew stretchy ice could make dwarf planets bright

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