There's plenty more. The most obvious being that people you know aren't always from the same point in time as yourself. For instance, a good friend of mine is from nearly twenty years in the future--A fact easily validated by his age.

There are also a number of people I've spoken to that claim to have been another species entirely before arrival--That would be easily enough dismissed if it weren't for others validating or having similar experiences to theirs. In addition, many people claim to come from countries and cities that I've never even hear of before.

Gather all the data together, and the only possible conclusion is some shift in space-time.