In 2001 the discovery of a tiny fossilized jawbone hit the headlines. The jawbone, only a few centimeters long with seven rows of teeth, was found abandoned in a dusty museum where it had lain unnoticed for decades. Its rediscovery has caused a sensation in the world of palaeontology because scientists now believe it may be a tiny remnant of a 'missing link', an ancient extinct animal that could provide a vital clue in our understanding of one of the great mysteries of science - how, 360 million years ago, a slimy fish-like creature grew legs and walked out of the water, onto the land to become our ancestor. This mystery has taken scientists a century to unravel. And this tiny jawbone may be a final clue.
