What do you do when you discover you’re wrong? That’s a conundrum Daniel Bolnick recently faced. He’s an evolutionary biologist, and in 2009 he published a paper with a cool finding: Fish with different diets have quite different body types. Biologists had suspected this for years, but Bolnick offered strong confirmation by collecting tons of data and plotting it on a chart for all to see. Science for the win! The problem was, he’d made a huge blunder.

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