In 1991, University of Cambridge computer researchers pointed a camera at a corridor coffee pot so colleagues would not climb several flights of stairs only to find it empty.
On New Year's Eve 1853, natural-history artist Benjamin Waterhouse Hawkins hosted scientists and Crystal Palace officials inside the mold of an Iguanodon sculpture.
Open a richly decorated European manuscript from the 13th or 14th century and the margins may stage a battle nobody requested: an armored knight jousting with a giant snail.