3 ms·

Well "were" doesnt preclude "are". To say "are" however requires a whole set of other evidence much harder to obtain.

• craftyguy 9y ago
  Why do you think evolution has decided to stop with us after running for several billion years on at least one planet in the universe?
  • deleted 9y ago
    [deleted]
  • acomar 9y ago
    That's not what they're saying. The point is that it's easier to say something about the past with the benefit of hindsight than to say something about on-going action. How would you prove that positive selection for these traits exists right now? What kind of evidence would that take?
    • craftyguy 9y ago
      I see, yea I misunderstood. Thanks for the clarification.
  • cryptonector 9y ago
    The question is whether some specific genes are still being selected for, and the answer is not obvious, though it's a good bet that if they were, and if we're seeing a rise in incidence, then they are.