Materials Similar to The Soundry: A Brief History of the Recording of Sound
- 45%: The Soundry
- 34%: Center for History of Physics: Bright Idea - The First Lasers
- 33%: The Search for the Extrasolar Planets: A Brief History of the Search, the Findings and the Future Implications
- 30%: A short history of electrostatics
- 29%: The Soda Bottle Speaker
- 29%: Cosmic Journey: A History of Scientific Cosmology
