BrainStuff Classics: Why Are Stop Signs Red?
Stop signs were always the red octagons we know today -- so how was the color chosen, and why has it stuck? Learn about the history and psychology of red traffic signals in this classic episode of BrainStuff.
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The Birding Life Podcast Network
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The 365 Days of Astronomy
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Tom Nelson
Thomas Nelson
Trent Loos Podcast
Trent Loos
Eye On The Sky
Vermont Public
Science Friday
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The Best of Coast to Coast AM
iHeartPodcasts and Coast to Coast AM
Bedtime Astronomy
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