The vast (vast!) majority of humans need a passport in order to travel internationally. Learn why -- and who doesn't -- in this classic episode of BrainStuff.

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<p>The vast (vast!) majority of humans need a passport in order to travel internationally. Learn why -- and who doesn't -- in this classic episode of BrainStuff.</p><p> </p> Learn more about your ad-choices at <a href="https://www.iheartpodcastnetwork.com">https://www.iheartpodcastnetwork.com</a>

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.

BrainStuff

BrainStuff Classics: Why Do I Need a Passport to Travel?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/85568e75-b0f1-4b17-a80b-ae3200468f22/transcript