People argue against the possibility of time travel by saying, "If humans will eventually be able to travel back in time, then where are all the tourists from the future?" This idea is similar to the ___________, only applied to time travel instead of aliens.

Question

Quizplus · Accepted Answer

The argument presented in the question is a variation of the Fermi paradox, which concerns the apparent absence of evidence for the existence of extraterrestrial civilizations that should be abundant in the universe. Similarly, if time travel were possible, one might expect to see evidence of visitors from the future, leading to the question of why we have not encountered any. The Drake equation concerns the probability of finding extraterrestrial life, while the cosmological principle pertains to the large-scale structure of the universe. The Urey-Miller experiment and evolutionary tree of life are topics in the field of biology and do not relate to time travel or the search for extraterrestrial life.

People Argue Against the Possibility of Time Travel by Saying