http://www.nytimes.com/2006/04/06/science/06fossil.html?_r=2&hp&ex=1144382400&en=f4bbf761f85f4c1b&ei=5094&partner=homepage&oref=slogin&oref=slogin "Scientists have discovered fossils of a 375-million-year-old fish, a large scaly creature not seen before, that they say is a long-sought missing link in the evolution of some fishes from water to a life walking on four limbs on land."