The Neanderthals\' Dark Secret A tomb of bones, 49,000 year-old Neanderthal bones, has been discovered by chance in a remote, mountainous region of Northern Spain. It is an unparalleled end. It may help solve the biggest Neanderthal puzzle of all—why we are here today and they are not. Mystery surrounds the cave system called El Sidron. The bones are buried 20 metres below ground, and almost a quarter of a kilometre from the tunnel entrance. How did they get here?
