Astrophysicist Neil deGrasse Tyson pushes back on unsubstantiated assumptions that recently shot down UFOs come from extra-terrestrial beings. #CNN #News #shorts Source

In this week's questions and answers show, I explain why people might see extraterrestrials as a threat. What could we learn about astronomy if we lived at the center of a supervoid, and how far away are we from the Big Bang? 00:00 Start 01:10 Why do we assume extraterrestrials are evil? 07:40 ...