Chewing gum is everywhere today, but where does it come from? What did we chew before Bubblicious? How does gum affect us? Robert and Joe explore in this episode of Invention. (Originally published 7/8/2019)
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Toys, Part 1
The Microwave, Part 2
The Microwave, Part 1
The Turnspit Dog
Canning
Invention Classic: Guillotine
Casket-a-go-go, Part 3
Casket-a-go-go, Part 2
Casket-a-go-go, Part 1
Ketchup
Air Conditioning, Part 3
Air Conditioning, Part 2
Air Conditioning, Part 1
The Telescope
Bubble Wrap
Listener Mail: Machine
Scissors
Bread/Toast/Toasters
The Hypodermic Needle
The Earthquake Detector
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