Need a Home for 80,000 Puzzles? Try an Italian Castle. Earlier this year, George and Roxanne Miller relocated the world’s largest collection of mechanical puzzles from their home in Florida. But first they took a road trip.
What Number Comes Next? The On-Line Encyclopedia of Integer Sequences Knows. The “mathematical equivalent to the FBI’s voluminous fingerprint files” turns 50 this year, with 362,765 entries (and counting).