If some species has been at a high-tech level for the equivalent of not only thousands of years but millions, they would realize that the cosmos or multi-verse is like an interactive recording & projection of time & space.
https://jonrappoport.wordpress.com/2018/03/12/head-of-secret-pentagon-program-says-ufos-can-warp-space-time-what
https://en.wikipedia.org/wiki/Spacetime#History
https://en.wikipedia.org/wiki/Spacetime#Mutual_time_dilation_and_the_twin_paradox
https://en.wikipedia.org/wiki/Spacetime#Beyond_the_basics
https://en.wikipedia.org/wiki/Spacetime#Introduction_to_curved_spacetime_summary
https://en.wikipedia.org/wiki/Kip_Thorne#Adaptation_in_media
https://www.skeptic.com/science-salon/kip-thorne-gravitational-waves-black-holes-time-travel-hollywood
"The book features a foreword by Stephen Hawking and an introduction by Frederick Seitz. In addition to the main text, the book provides biographical summaries of the major scientists in the text, a chronology of key events in the history of black hole physics, a glossary of technical terms, twenty-three pages of notes, a bibliography, and alphabetical indices of subjects and people referred to in the text."
https://en.wikipedia.org/wiki/Black_Holes_and_Time_Warps
https://uforum.blogspot.ca/search?q=Time+Travel , https://uforum.blogspot.ca/2018/02
