WORMS AND BILLIARDS. “Darwin conducted both lab experiments in his study and billiard room and field investigations in his extensive gardens. He published his findings in 1881 in a book titled The Formation of Vegetable Mould through the Action of Worms, with Observations of their Habits. The book sold 6000 copies in its first year, selling faster than On the Origin of Species had when it was first published.”
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