Episode

BrainStuff

HowStuffWorks

Science & Medicine, Natural Sciences, Society & Culture, Technology

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Science & Medicine 12
Natural Sciences 5

Whether the topic is popcorn or particle physics, you can count on BrainStuff to explore -- and explain -- the everyday science in the world around us.

Why Do I Need A Passport To Travel?

September 12th, 2016

Episode 1044 of 1068 episodes

For the vast majority of international travelers, a passport is a necessity. But why?

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