Author Avi Loeb on evidence of close extraterrestrial encounters, new book

Professor Avi Loeb is a respected astrophysicist, former chair of Harvard’s Astronomy Department, and a published author. In his new book, Loeb writes that we may have had a brush with an alien civilization a couple of years ago. Michelle Miller has the details. Watch “CBS This Morning“ HERE: Download the CBS News app on iOS HERE: Download the CBS News app on Android HERE: Like “CBS This Morning“ on Facebook HERE: Follow “CBS This Morning“ on Twitter HERE: Follow “CBS This Morning“ on Instagram HERE: Get new episodes of shows you love across devices the next day, stream local news live, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! Each weekday morning, “CBS This Morning“ co-hosts Gayle King, Anthony Mason and Tony Do