Superman is one of Batman’s employees, because The Daily Planet (Where Clark Kent works) is owned by Wayne Corporation (Wich is owned by Bruce Wayne).
Mary Shelly keept her dead husband’s heart
Frankenstein author Mary Shelley kept her dead husband’s heart and carried it with her for almost 30 years until she died in 1985. It was found in a desk drawer a year later, wrapped in a copy of one of his final poems.