Bill and Ted, Marty McFly, those guys in the hot tub; time travel seems to belong in the world of fiction, but here are some ideas that might make it a reality in 10 mind-bending theories about time travel.
Bill and Ted, Marty McFly, those guys in the hot tub; time travel seems to belong in the world of fiction, but here are some ideas that might make it a reality in 10 mind-bending theories about time travel.
