BBC Radio 4 - Everything We've Ever Known About...

Nine fascinating facts about the sea

The sea covers 71 percent of the Earth's surface, but we've got the sea covered.

A selection of amazing facts we used to believe about something we all do loads of.

What did Jake Yapp discover about a most essential organ?

Roll up your sleeve and brace. Here are 7 things we've learned about vaccination.

Six things we learned about gravity (and one about chicken nuggets).

We reveal some surprising things that science used to think about air.

Take the quiz to see what you know about what we used to think we knew.