The Secret Genius of Modern Life
Hannah Fry uncovers the secrets behind the miraculous technologies of the modern world, revealing the mind-blowing stories behind their invention.
4. Doorbell
6.0Apr 23, 2025 · 59 min
The rise of the smart doorbell is one of the great tech success stories of the 21st century. Hannah heads to Los Angeles to take a deep dive into doorbell history and talk to market leaders Ring.