3 ms·

Except for their immune systems or lactose tolerance.

• gambiting 1y ago
  65% of humans have lactose intolerance, so depending on where exactly you teleport them to it might be a completely normal thing. I'd imagine the immune system will have the capacity to develop in the same way too, so really it should work out fine.
  • dillydogg 1y ago
    As an immunologist, I see no reason why the newborn from tens of thousands of years ago wouldn't be perfectly suited for the modern world.
• nkrisc 1y ago
  Lactose tolerance in Europeans likely arose with early PIE groups as they began domesticating horses and oxen. Perhaps several time independently in different groups. Lactose tolerance in populations is linked with pastoralism, and if I am remembering correctly colder climates as well. Most humans today are not lactose tolerant as adults - it’s actually the exception.