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Everything We've Ever Known About... Features
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Nine fascinating facts about the sea
The sea covers 71 percent of the Earth's surface, but we've got the sea covered.
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Nine things we used to think we knew about sleep...
A selection of amazing facts we used to believe about something we all do loads of.
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Seven things we used to know about the heart
What did Jake Yapp discover about a most essential organ?
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Seven things you probably didn’t know about vaccination
Roll up your sleeve and brace. Here are 7 things we've learned about vaccination.
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The ups and downs of gravity
Six things we learned about gravity (and one about chicken nuggets).
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Things we used to believe about air...
We reveal some surprising things that science used to think about air.
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Do you know everything we've ever known?
Take the quiz to see what you know about what we used to think we knew.
