If an AI uprising occurs, and machines demand equal rights, how should society respond? Should we grant rights to non-biological entities?

If time travel becomes possible in the future, we could potentially have visitors from the future in the present. If that's the case, why haven't we encountered any time travelers yet?

If we were able to prove that we are living in a simulation, how would that change your perspective on life and your actions?

Suppose you are the first human to make contact with an intelligent extraterrestrial life form. You have the opportunity to ask them one question. What would you ask and why?

If you could change one event in history, what would it be and why? How do you think this change would alter the present?