https://thenextweb.com/science/2020/01/24/scientist-says-aliens-in-ufos-might-be-earthlings-from-the-future/

We’ve been chasing ET for millennia with nothing concrete to show for it. Aside from conspiracy theory claims that the US government has an alien spacecraft hidden away somewhere, the search for alien life has been a complete bust.

Michael Masters, a professor of biological anthropology at Montana Technological University in Butte, thinks that could be because UFOs are piloted by humans from the future, not aliens from another planet.