Antikythera
The Greek antikythera was a mystery for years, an intricately complex piece of machinery that scholars eventually concluded was used for astronomy. The FAQs at the Antikythera Mechanism web site includes "Is the Antikythera evidence of time travel?"The answer, of course, is no. It's evidence that our precursors were much more capable and much more like us than we usually give them credit for.
Filmmaker George Clarke recently discovered a clip that some people believe is evidence of time travel.
It appears in the DVD extras from Chaplin's The Circus, and shows a woman in the background using what appears to be a cellphone. Since the footage was shot in 1928, that's an anachronism to say the least.
The discovery excited not just the blogosphere, who are ready to gawk at and dismiss anything the least bit interesting, but news-hungry cable TV, which presented it as news with about as much journalistic scrutiny as Ron Burgundy gave the water-skiing squirrel in Anchorman.
If it were a one-time thing, we'd chalk it up to a fluke. But we've seen this before. "Time Traveler Captured on Film" has graduated from meme to trope.
There's something about the juncture of photography, consumer tech, history (near and far) and our readiness to believe in conspiracies, science fiction and the occult that leads us to fall for this shtick over and over again.