Named Kampecaris obanensis, the prehistoric millipede lived during the Silurian period, about 425 million years ago. The ancient creature was a small (2-3 cm in length), short-bodied animal with three recognizable sections. It likely lived near a lake in a semi-arid forested environment and ate decomposing plants. Its fossilized remains were unearthed on the island of Kerrera in the Scottish Inner Hebrides. The specimen is about 75 million years younger than the age other paleontologists have estimated the oldest millipede to be using a technique known as molecular clock dating. The oldest fossil of a land-dwelling, stemmed plant, Cooksonia, has...