The American dollar has been the de facto world currency for decades. Learn why -- and what would need to happen for that to change -- in this episode of BrainStuff.
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How Did Beer Help Sell the Myth of Custer's Last Stand?
10:08

How Does Bioluminescence Work?
12:15

How Is Maillardet's Automaton Still Wowing Us After 200 Years?
09:28