[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...:^)

[John Valentine]

Apparently these highly evolved spacefaring “green” aliens are quite morally capable of pre-emptive genocide against another race to prevent that other, non-spacefaring race from what?

Exporting a violent culture capable of potential genocide against another race of space creatures?

This is not only nonsense, but it is specious, illogical nonsense.

Exactly the kind of journalism that the Guardian has specialized in for decades.