Ooh ooh ooh, Bad Astronomy posted (a while ago) a fabulous list of Ten Things You Didn’t Know about the Earth. If you dig my science myths, check this one out. Such gems as “The earth is smoother than a billiard ball,” “Destroying the earth is hard,” and “Mt. Everest isn’t the biggest mountain.”
See also his earlier Ten Things You Didn’t Know about the Milky Way.