Originally Posted by sirhcyennek81
I can believe aliens are hostile and would come to earth for less then noble purposes...but regular H20 is an acid for them? What happens if they land in North Africa and the area gets one of those once every two centuries rain storms?...there goes that invasion fleet. What about water vapor in the air? They should not have been able to breathe on earth...
Ummm easy answer actually.
Do you know of any planets with human life that AREN'T 70% covered with water? Maybe they didn't have a choice. Better a planet with 70% water and lot's of human life than a planet with 0% water and no human life, right?