Neil deGrasse Tyson Explains Why UFOs Aren't Visiting Space Aliens (Part 27)

Watch the full interview now as a VladTV Youtube Member -    / @vladtv   Part 26:    • Neil deGrasse Tyson on How Self-Driving Ca...   Part 28:    • Neil deGrasse Tyson Doubles Down on Why Al...   Part 1:    • Neil deGrasse Tyson on Growing Up in Castl...   -------- In this clip, DJ Vlad reads a previous quote from Neil deGrasse Tyson where he openly doubts the existence of aliens and the validity of UFO sightings caught on camera. The famed scientist/TV host responds by doubling down on his viewpoint, by indicating that there still isn't enough evidence to prove space aliens have visited Earth.