Humanity at the Evolutionary Crossroads
Robert said:
"If it's a matter of brain size, as the article suggests, that's bad news for our womenfolk. The size of an infant human's skull is already pushing the limit of what's anatomically possible. If we accommodate a further increase in skull size through artificial means, then humanity could someday find itself unable to reproduce "in the wild", and that's not a good thing."
This may be the main reason why the next step in human evolution may not be biological.