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in *Ocean Renegades* about the life during the Paleozoic drops biology fire:

“So basically… the lungs and limbs are things that evolved a long time before any fish stepped onto land. And they evolved for reasons that are unrelated to walking on land.”

“You’ve got it 😌”

“Complicated structure like these don’t just evolve overnight.”

STEM education is hard. Core concepts like this, that influence everything, are subtle and easy to misunderstand and hard to quiz on.

One of my favorite science books, “Your inner fish”, was written by , who led the team that discovered some fifteen years back, a crucial link in the evolution of tetrapods about 375 mya. Solid, highly recommended.

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