DAVID's comment: This new find just adds to mystery of why whales bothered to evolve.

dhw: Or, if we follow the David Turell theory of evolution, it deepens the mystery of why God, whose sole purpose was to produce homo sapiens, bothered to preprogramme (or dabble) all these different types of pre-whale and whale.

And it all started with a cat-sized hoofed animal who lived on a shoreline and liked to swim!