A tuft of tangled human hair is dug out of Greenlands permafrost. From these 4,000-year-old threads of evidence, scientists attempt the impossible to be the first to reconstruct the identity of a Stone Age human being. From the scraps of DNA, an ancient face appears. But as they break into this genetic code, they find far more than they bargained for, and the discovery threatens to turn our long-held concept of how humans populated the earth, on its head.
Leonardo da Vinci's "The Battle of Anghiari" vanished 500 years ago, with only copies rendered by other artists left behind to confirm its existence. Scientist and art enthusiast Maurizio Seracini, has dedicated 36 years to tracking down the missing mural, and seems to be on the verge of uncovering the hidden fresco behind the walls of the Palazzo Vecchio in Florence, Italy.