Previously: My brother the physicist explains Futurama and Animorphs. Hey, John Boy. I made you watch The Core with me this week and you were a pretty good sport about it. It's a pretty ridiculous movie -- the basic premise is that the earth's core stops rotating, dissolving the magnetic field surrounding the atmosphere, and a group of astronauts/scientists/Stanley Tucci have to set off nuclear bombs at the center of the earth to get…