How to Fall Through the Earth

We've had a bunch of people writing in and tweeting in about what it would feel like to fall through the earth. And on Twitter, Merck at M-U-R-K-E-E says our physicist here. They say it would be freefall all the way. So if you're falling through a hole, can you still hit your head? Do you just look like David Bowie in at the end of lab? You just root and step. How you turn the world real fresh.