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You all need to see this:

https://www.youtube.com/watch?v=7GcL3a4WK6M

Do not underestimate what humans can achieve. The way we live right now is comparatively primitive to what we've discovered up to this point. Google (the company in which the futurist in the documentary now works for) spent half a billion dollars to acquire DeepMind, a leading AI startup, also created their own company called Calico for the express purpose of solving the "problem of aging," this is pretty serious business.

....also, time travel in theory is possible, but only when travelling forward in time - so no Marty's mom 1955 for you.