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How much of natural history is inevitable, and how much is the result of chance? Do mass extinctions slow the evolution of the biosphere, or speed it up? These are two of the six great questions of biology explored by Simon Conway Morris, famous evolutionary theorist, in his latest book. From Extraterrestrials to Animal Minds: Six Myths of Evolution (Templeton Press) is a meticulously researched, cheeky and inspiring romp through both the living and extinct worlds, challenging a handful of widespread beliefs and offering provocative alternatives. Conway Morris is a character, even amidst the strange ranks of his fellow natural history researchers, and his arguments bear careful scrutiny. As someone drawn to mavericks and weirdos and enamored by contrarian perspectives, I can’t help but like his work — and reading him forced me to reconsider some of my assumptions even as it validated other long-held hunches.

In this episode, we talk about his book and what his work implies — and I get fanboy on him and assault him with a bunch of lengthy questions like Tim Murphy in Jurassic Park. Strap in for a deep dive into evolution’s laziness, complexity and process, cooption and repurposing of novel traits, great puzzles in prehistory, ancient food webs, evolutionary radiation, symbiosis, flowers, death, and more… And when you’re done, go read his book and dig a dozen more related episodes on Patreon!

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