Quote Originally Posted by walrus View Post
We have the ability not to be destructive man has done some great things, 1900 first plane, not even a hundred years and we are on the moon. It is quite amazing if we were not all so caught up in our differences God knows what we could get done
It's true we have had some amazing accomplishments, but it's not only our differences that might worry an intelligent alien species, but the way we behave toward other life forms here on earth.

Humans have been causing the worst extinction event since the comet hit some 65 million years ago.