megyn: at the top of the next hour a highly anticipated nasa news conference that is lighting up the internet with theory and rumor, an announcement on the search for evidence of extraterrestrial life. that is how nasa is putting it. phil keating has morement what is nasa expected to say. >> reporter: they are expected to announce they have discovered alien life living amongst us here on planet earth, specifically out in california, at yosemite national park. in brand-new video released on youtube by the journal of science you can see the area in question, it's mono lake. it's there that a researcher has spent the past two years. she has been studying the mud around the basin which is about 25 square miles wide and large. within it is perhaps one of the world's most highly arsenic