3 ms·
Ask HN: With Time Travel, if our descendants visit us, would they be ‘aliens’?
- rolph 6y agoso, an antideluvean civilization of high technology, invents near light speed [relativistic] travel, the time dilation results in a trip to and fro, returning many thousand years later to a degenerate civilization [us] that still thinks smartphones are a neat idea.
- simonblack 6y agoHow could a people with only sticks and clubs* for weapons possibly invent time travel? * (Einstein)