Professor Knowledge gives us 5 Inventions That Came Out of the Great Depression. Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices">megaphone.fm/adchoices</a>

Professor Knowledge gives us 5 Inventions That Came Out of the Great Depression. Learn more about your ad choices. Visit megaphone.fm/adchoices

Professor Knowledge gives us 5 Inventions That Came Out of the Great Depression. Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices" rel="noopener noreferrer">megaphone.fm/adchoices</a>

5 Inventions That Came Out of the Great Depression

Professor Knowledge welcomes you into his classroom for History lessons you never knew you needed.

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5 Inventions That Came Out of the Great Depression

5 Inventions That Came Out of the Great Depression