Tucker Hiatt: How fast are you moving right now?

"How fast are you moving?" seems like an easy question, but it's actually quite complicated -- and perhaps best answered by another question: "Relative to what?" Even when you think you're standing still, the Earth is moving relative to the Sun, which is moving relative to the Milky Way, which is...you get the idea. Tucker Hiatt unravels the concepts of absolute and relative speed. [Directed by Zedem Media, narrated by Addison Anderson].

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S2014E12 - Richard E. Cytowic: What percentage of your brain do you use?