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From colliding galaxies to supermassive black holes, we take a look at some of the strangest sights in the universe

Best books… Susie Dent Countdown ’s lexicographer picks ...

Much of what we don’t understand about being human is simply in our heads. The brain is a befuddling organ, as are the very questions of life and death, consciousness, sleep, and much more

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Some of the other things on our minds when we weren’t doing everything else

Are you a bit of a quiz whizz? Pit your wits against the mixed bag of posers below and see how you get on…