In 1901, this Ladies Guide in Health and Disease ad advised women that they should let an "eminent German physician" cure their constipation by rolling a leather-encased cannonball around on their tummies.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.