Today, revolving doors are a common sight in large buildings across the world, but how did they get here? This episode revolves around Theophilus Van Kannel and his astonishing Stuff of Genius.
Find out more about the innovative revolving door in this episode including why they are so energy efficient!
about 22 hours ago
What does Santa Anna have to do with chewing gum as we know it today? http://t.co/alJuyrDGFa
3 days ago
Before they were for ladies, high heels were worn by soilders in battle! http://t.co/GjGAPM1KzS
8 days ago
Although glasses are making a coming back, contact lenses sure are an incredible alternative: http://t.co/xne51iW5y5
11 days ago
It'd be cool if we all spoke one common language! Esperanto sure does sound like a way to avoid miscommunication: http://t.co/chTtsgTncY
16 days ago
Love Math Puzzles? Learn the origins of Sudoku: http://t.co/pgFNC4hrI9
about a month ago
Doctors use the EKG to detect & diagnose tricky heart conditions. Here's how this incredible machine was made: http://t.co/JqF0RAvf2M