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Why Carnegie Institution researchers think deep-sea hydrothermal vents hold key to origin of life. Made by ancient man or nature – investigating the mystery of the underwater structure discovered off the island of Yonaguni, Japan. How celocanths were discovered in Indonesian waters. Ants cultivating fungi were the first farmers on the planet. The "clock" gene could be responsible for some people disliking mornings.

Presenter: Dee Palmer.