[Radio] We Ask Not Why But How: Falling through the earth

holes01An old idea that you might have heard thrown about is that if you dug a hole straight through the center of the earth from America, you’d end up in China. Ignoring the fact that this is currently impossible and that to end up in China you would need to start digging somewhere in Argentina, the concept does raise a rather interesting theoretical question: assuming we did manage to dig such a hole, how long would it take to fall through it and come out the other side?

I spoke with Alexander Klotz, who published a paper on the subject in the American Journal of Physics.

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