All life evolves all the time, but there's less -- or practically no -- evolutionary pressure on humans anymore, so bigger changes don't happen as fast. It's s

All life evolves all the time, but there's less -- or practically no -- evolutionary pressure on humans anymore, so bigger changes don't happen as fast. It's still constant change, but now it's a random walk where all directions are just about as good, so no mutation has a significant edge on survival, so the little changes tend to cancel each other out.