Really, aliens? You invade a planet that is made up of stuff that can melt flesh off your bones? You deserve to be defeated by Joaquin Phoenix and a baseball bat. Stupidest invasion ever.
Invasion score: FWell, actually, it's not that stupid after all. There are two reasons for this: 1) habitable planets are not as common or as easy to get to as we would like, and 2) humans, who consider themselves to be intelligent creatures, routinely invade or inhabit lands that present serious challenges to our well being. I'll expand these two points below:
I. Habitable Planets