Many spray can lids have a tiny hole at the top. Check out this HowStuffWorks podcast to learn more about spray cans, shipping and air pressure.

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Many spray can lids have a tiny hole at the top. Check out this HowStuffWorks podcast to learn more about spray cans, shipping and air pressure. 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.

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Many spray can lids have a tiny hole at the top. Check out this HowStuffWorks podcast to learn more about spray cans, shipping and air pressure.

Why is there a small hole on the top of spray can lids?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/868735b5-5c7a-49de-a458-ae32009bd9a8/transcript

Helen is a figure from Greek myth -- a daughter of Zeus with a mortal woman, and said to have been the most beautiful woman in the world. Learn more about her (and how she perhaps inadvertently started the Trojan War) in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/history-vs-myth/helen-of-troy.htm

Helen is a figure from Greek myth -- a daughter of Zeus with a mortal woman, and said to have been the most beautiful woman in the world. Learn more about her (and how she perhaps inadvertently started the Trojan War) in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/history-vs-myth/helen-of-troy.htm

Who Was Helen of Troy?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/23b8003e-215b-4447-b574-b46600cf6630/transcript

Your heart needs blood as much as any other muscle in your body, and it receives it the same way -- just a little earlier than anyone else. Learn how the coronary arteries work (and what can go wrong when they don't) in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/human-body/systems/circulatory/heart-pump-blood.htm

Your heart needs blood as much as any other muscle in your body, and it receives it the same way -- just a little earlier than anyone else. Learn how the coronary arteries work (and what can go wrong when they don't) in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/human-body/systems/circulatory/heart-pump-blood.htm

How Does Your Heart Get Blood?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/3b0bf076-765e-403c-af25-b46600cf6623/transcript

Butterfly wings often come in striking, iridescent colors -- but it's not from pigments (or not entirely). Learn how microscopic structures give butterfly wings their flash in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/insects/butterfly-colors.htm

Butterfly wings often come in striking, iridescent colors -- but it's not from pigments (or not entirely). Learn how microscopic structures give butterfly wings their flash in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/insects/butterfly-colors.htm

How Do Butterflies Get Their Brilliant Colors?

https://api.omny.fm/orgs/e73c998e-6e60-432f-8610-ae210140c5b1/clips/a0013e54-e55f-4908-bfb8-b460015766a5/transcript

Why is there a small hole on the top of spray can lids?

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