To find out more about dark matter check out our feature on it in issue 7 of All About Space, on sale now.
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What shape is space?
There’s plenty of it, so what shape do we think the universe is?
What happens when two galaxies collide?
Do things crash together or is it more serene?
When did the first black holes form in the universe?
Was it around the time of the Big Bang, or billions of years after?