Add Yahoo as a preferred source to see more of our stories on Google. Photo by Michael Loccisano/Getty Images for Webby Awards Neil deGrasse Tyson, who for years has laughed off and shot down ...

Neil deGrasse Tyson, who for years has laughed off and shot down questions about UAP and aliens, is ready to talk at length about the phenomenon - and wants to see some real proof after the latest ...