Will Earth be reborn by aliens

Another year and a half ago it seemed that predictions about future changes to our planet in the current 2012 - it's just another joke press; imposed by the picture to distract people's attention from pressing problems. Only on some "spaces" Internet hosts "mountains" of materials on this topic. Global warming, earthquakes, tsunamis, huge gaps in the ground, the anomalous cold and heat, floods and floods. And yet, the majority of people trust the comments that accompany each event happened. And they are reduced to that - it's just the physical phenomena inherent in the nature of the earth. Well, think of an earthquake, and when they were not there? Floods? Yes, we have for the first time rivers overflow their banks?