Why Darwin was wrong about the tree of life

darwin-was-wrongIN JULY 1837, Charles Darwin had a flash of inspiration. In his study at his house in London, he turned to a new page in his red leather notebook and wrote, “I think”. Then he drew a spindly sketch of a tree.

As far as we know, this was the first time Darwin toyed with the concept of a “tree of life” to explain the evolutionary relationships between different species. It was to prove a fruitful idea: by the time he published On The Origin of Species 22 years later, Darwin’s spindly tree had grown into a mighty oak. The book contains numerous references to the tree and its only diagram is of a branching structure showing how one species can evolve into many.

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