It's long been something of a holy grail for those bent on the idea of recreating species lost to the Earth through extinction, and now the Russians and Japanese are actually planning to do it--we're going to clone a woolly mammoth, you guys. That's right. Using intact bone marrow recovered from the thigh bone of a woolly mammoth found in the thawing permafrost of Siberia, researchers think they will likely clone a living, breathing mammoth in just five years. (Whether we believe them is a different matter entirely.)