- Hearing aid invented.
- Periscopes become commonly available for submarines.
- Italian railways switch to electric.
- Drum brake invented for automobiles.
- Spring: 140,000 miners walk off their jobs in northeastern Pennsylvania to demand an eight-hour day and improved working conditions.
- The World of Indiana Jones
- Theodore Roosevelt and The American Century (Non-fiction source)
- Braque & Picasso - A Collaboration Cubed (Non-fiction source)
Notes and references