Remember as a child on the beach you'd try to 'dig a hole to China'?
(and these days we know it's not safe to dig giant holes for fear of being buried to death by sand)
Well, it turns out, if you actually dug straight through the Earth's center to the other side, you'd drown... and no where near China...
http://www.youtube.com/watch?v=XAxGccJNw0A
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