I think it's rather unlikely that we will find time travellers among us, for two reasons: We don't seem to be anywhere close to inventing time travel. If time

I think it's rather unlikely that we will find time travellers among us, for two reasons: We don't seem to be anywhere close to inventing time travel. If time travel is invented, say, 10000 years from now, our moment in time might not be interesting enough to travel to. All the funny paradoxes caused by time travel suggest that time travellers could fork a new branch in the multiverse, but that would not change the future they were coming from and they would never be able to return to that future. Hence, the interest in travelling back in time might not be that great, even if it were possible.