Leading edge technology from another dimension or from another world?
https://mysteriousuniverse.org/tag/triangular-ufo
https://www.reddit.com/r/Futurology/comments/bgoh9y/us_navy_patent_released_of_triangular_aircraft/#:~:text=US%20Navy%20patent%20released%20of%20triangular%20aircraft,gravity%20waves%20to%20travel%20at%20extreme%20speeds.
Do the New X-Files Take Place in an Alternate Reality?