[az_gila]

Try this link - UK Guardian

http://www.guardian.co.uk/science/2011/aug/18/aliens-destroy-humanity-protect-civilisations

[az_gila]

If you read the article, it says NASA assumes (Hansen?) that the aliens are “green aliens” - yes, it uses that term.

What if they are actually "brown aliens" and polluted enough to develop efficient, economical space travel? I guess NASA wasn't allowed to postulate on that.

You wonder what these so-called scientists are smoking...:^)