xkcd.com: A webcomic of romance and math humor.

Models of the Atom
J.J. Thompson won a Nobel Prize for his work in electricity in gases, but was unfairly passed over for his "An atom is plum pudding, and plum pudding is MADE of atoms! Duuuuude." theory.

Missal of Silos
Welcome to Wyoming, motto "We'd like to clarify that Cheyenne Mountain is in Colorado."

Magnetic Pole
People keep trying to come up with reasons that we should worry about the magnetic field collapsing or reversing, but honestly I think it's fine. Whatever minor problems it causes will be made up for by the mid-latitude auroras.

Thor Tools
CORRECTION: After careful evaluation, we have determined that the axis label on this chart was printed backward.