Can you figure out when and where this photograph was taken? There actually is no recorded date attached to the amazing image, so let's try to crack the code and figure this one out. There are, however, details about where in New York this man put his head in a hippo's mouth, so we'll update later in the day with more information about that.

UPDATE: Since we first posted this photo we've found out the year it was taken in, along with an accompanying photo. The photo was taken sometime around 1910 in Central Park, meaning it wasn't Rose, who didn't arrive until the 1930s (here's some amazing video of Rose and her friend!).