NASA, you should really know better than to say you've found something "surprising" without telling us what it is. That can lead a lot of people to speculate.
Yesterday our space agency announced that they'd found "Evidence of Surprising Activity on Europa," and promised to reveal more in a teleconference on Monday. Scientists think Jupiter's moon Europa might be capable of supporting alien life in the ocean beneath its icy crust. So of course, people's imaginations ran wild.
Well, NASA would like you to know that it's definitely not aliens.