I'm not sure how they could do in an outright manner without panicking a lot of people. Anyone can say something about the hoax doomsday of 2010 and people will believe it, or be in fear that it might happen, without even trying to consult with Mayan civilization experts.The NASA website has some articles that go in the direction of addressing the possibility.http://astrobiology.nasa.gov/ask-an-astrobiologist/question/?id=53http://www.nasa.gov/vision/earth/technologies/Life_Detector.htmlhttp://astrobiology.arc.nasa.gov/roadmap/g2.html