The sinking of the HMS Birkenhead: the event that gave rise to the “women and children first” protocol
Mengenlehreuhr: the Berlin Clock that shows time with the help of light signals and a mathematical theory
The “Kryptos” sculpture at the CIA headquarters in Langley, Virginia carries an unsolved encrypted message
Eddie Mannix: the real-life Hollywood fixer, studio executive and producer who inspired Coen brothers’ “Hail, Caesar!”
A sunken island on the Danube River, once a strategically important location with a thriving community