So the recent discovery of what appears to be two men near the river's edge in a photo of Cincinnati taken in 1848 is kind of a big deal among photography historians.

As reported by NPR's Robert Krulwich last month, the photo was taken by Charles Fontayne and William Porter -- who were standing on the other side of the Ohio River -- on Sunday, September 24th, 1848, 162 years prior to Krulwich's post about it.