Probably a sign of my misspent youth, but I know that nothing good can come from a project where Japanese scientists drill towards the center of the earth.
I've seen this attributed to the USAF, Quantas, and the Marine Air Corps. Personally, I think they're too perfect to be real, although my buddy Steve (who was a Marine pilot and AvTech) sez these are plausible.
If you're at all interested in archeology, you've probably read about the San Bartolo Mayan mural, which dates back to about 100 B.C.—about 700 years earlier than the Bonanpak murals, previously considered the oldest yet discovered.