In his scenario, we are the aliens ourselves:
… evolutionary biologist Scott Solomon isn’t terribly concerned with how humans plan to explore the universe. Instead, he’s focused his attention on what might happen to our species once we settle into our off-world homes. His surprising conclusion: future human colonists might not be humans at all.
“Eventually,” he recently told Business Insider, “people living in space could evolve to be different enough from people on Earth that we would consider them to be different species.”Kristin Houser, “Biologist: Babies born in space might not be fully human” at Futurism
That’s nothing compared to what he had to say about childbirth:
Narrator: That’s Scott Solomon, an evolutionary biologist and professor at Rice University. He walked us through what space might do to generations of humans born in low-gravity environments. We already know that the way we give birth influences our anatomy. For example, the size of our heads is restricted by the size of our mothers’ birth canals.
Solomon: With more C-sections, that could lead to larger heads in our descendants because they wouldn’t be constrained by the size of the birth canal.Gene Kim and Rebecca Wilkin, “If humans gave birth in space, babies would have giant, alien-shaped heads” at Business Insider
Actually, it’s a good thing if the space kids are weird-looking because then they won’t mind the webbed feet that climate change is going to give us all. 😉
See also: Paleoanthropologist: Climate change will cause us to grow webbed feet What we need right now is an earnest, just-published study offering convoluted neuroscience theories as to why so many people don’t trust science.
Tales of an invented god
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