Giant fossils uncovered in the Sahara Desert reveal new secrets of how whales evolved. A spectacular fossil graveyard reveals a 43-million-year-old whale that had four legs and could walk. Follow ...
A wasted dig -- Fish, mammal, or dinosaur? -- A whale with legs -- Learning to swim -- When the mountains grew -- Passage to India -- A trip to the beach -- The otter whale -- The ocean is a desert -- ...
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