To recreate an extinct species exactly, evolution would have to reproduce not just its traits but its entire genetic code — an impossibly specific combination. Each species’ genome contains billions of base pairs, and even small mutations (a few hundred or thousand changes) create new biological identities.
With millions of mutations occurring across countless generations, the odds of nature reassembling the same blueprint are effectively zero.
So, it’s not looking hopeful for Homo sapiens. If every single human were to die tomorrow, the chance of the Homo sapiens genome evolving identically is negligible. The question then becomes, could human-like traits reemerge over billions of years?
The paleontologist Simon Conway Morris points out that there are common and widespread patterns of convergent evolution in life’s history, where similar adaptations, like eyes, wings, and streamlined bodies, evolved independently in unrelated lineages.
For Conway Morris, human-level intelligence is a convergent trait that might well appear again given the right conditions. Evolution, he argues, is not purely random; it’s shaped by deep structural patterns that lead to recurring outcomes — even complex ones like minds capable of self-awareness.
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