Time travel to the future: real physics and the missing technology

What physics supports

Relativity allows different elapsed times for observers in different conditions of motion or gravity. NASA explains this through clock comparisons and satellite timing. In that physical sense, observers need not experience time at exactly the same rate. [Source 1]

What that does not give us

A measured difference between clocks is not a practical journey to a chosen future century. A human-scale route would need workable engineering, energy, a survivable environment and a destination. We have no such vehicle, device or service to offer today.

Different ways of reaching the future

Living longer means experiencing the intervening years. Preservation followed by revival would aim to bridge an interval through another mechanism. A relativistic journey would involve different elapsed times. They should not be advertised as interchangeable technologies, even when they serve a shared wish to see what comes next.

What about a rescue from the future?

We have no evidence that a future civilization can retrieve a particular person from the past or transfer their consciousness at death. Interest in that possibility can be recorded without presenting it as an existing service. We mean reaching a later time literally, while remaining open to other routes the patient accepts. The $100 offer is early participation in a conditional commitment, not a ticket on an existing time machine.

Sources and scope

This is an institutional explainer, not a clinical guideline or a claim that the institution has demonstrated these methods. Source dates matter; our discussion of the mission is editorial interpretation.

1. NASA Space Place: Is Time Travel Possible?

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