Every week, Ken Jennings and John Roderick add a new entry to the OMNIBUS, an encyclopedic reference work of strange-but-true stories that they are compiling as a time capsule for future generations.
In which we learn that one very specific region of West Africa produces more twins than anywhere else on earth, which could be due to heredity, yams, or, in Ken's mind, a mysterious glowing meteorite. Certificate #29437.