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

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

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

How Does Night Vision Work?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/d97527ca-1c68-4f2b-b8d1-ae3200657f10/transcript

No, it's not the lyrics -- the author of this nursery rhyme is what's in question. Learn why (and how Henry Ford was involved) in today's classic episode of BrainStuff, based on this article: https://entertainment.howstuffworks.com/arts/literature/controversy-behind-mary-had-little-lamb.htm

No, it's not the lyrics -- the author of this nursery rhyme is what's in question. Learn why (and how Henry Ford was involved) in today's classic episode of BrainStuff, based on this article: https://entertainment.howstuffworks.com/arts/literature/controversy-behind-mary-had-little-lamb.htm

BrainStuff Classics: What's the Controversy Behind 'Mary Had a Little Lamb'?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/7724a198-1313-48de-937b-b48100f05547/transcript

In 1961, the USSR set off a 57-megaton atomic bomb, nicknamed the Tsar Bomba. It's still by far the most powerful nuclear weapon ever built. Learn how its test changed history in today's episode of BrainStuff, based on this article: https://science.howstuffworks.com/tsar-bomba.htm

In 1961, the USSR set off a 57-megaton atomic bomb, nicknamed the Tsar Bomba. It's still by far the most powerful nuclear weapon ever built. Learn how its test changed history in today's episode of BrainStuff, based on this article: https://science.howstuffworks.com/tsar-bomba.htm

What Was the World's Largest Nuclear Weapon?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/7bf7466a-95b8-4c78-b862-b48100f05548/transcript

This large, loud hawk is probably North America's most common because it's so adaptable. Learn more about red-tailed hawks in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/birds/red-tailed-hawk.htm

This large, loud hawk is probably North America's most common because it's so adaptable. Learn more about red-tailed hawks in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/birds/red-tailed-hawk.htm

How Do Red-Tailed Hawks Work?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/8322b03c-0481-4032-bbb4-b48100f0554a/transcript

How Does Night Vision Work?

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