But Why – A show for curious kids
What are the dog days of summer?
7/18/2026 | 2m 25sVideo has Closed Captions
What are the dog days of summer? Probably not what you think. Woof!
Ever wonder why we call the hottest, laziest stretch of summer the "dog days"? You might assume it's because the heat makes everyone (and everything) pant like a puppy — but the real answer has nothing to do with actual dogs. It actually starts with a star. Learn more about it in this But Why Bite.
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But Why – A show for curious kids is a local public television program presented by Vermont Public
But Why – A show for curious kids
What are the dog days of summer?
7/18/2026 | 2m 25sVideo has Closed Captions
Ever wonder why we call the hottest, laziest stretch of summer the "dog days"? You might assume it's because the heat makes everyone (and everything) pant like a puppy — but the real answer has nothing to do with actual dogs. It actually starts with a star. Learn more about it in this But Why Bite.
Problems playing video? | Closed Captioning Feedback
Where to Watch But Why – A show for curious kids
But Why – A show for curious kids is available to stream on pbs.org and the PBS app.
Providing Support for PBS.org
Learn Moreabout PBS online sponsorshipMore from This Collection
Fun facts about the Earth and beyond!
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How do you sink in quicksand? Asks Jack from Texas. (2m 10s)
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Why do we need the sky? Asks Mary from New York. (2m 22s)
Are there really no trees in Iceland?
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A gorgeous country full of majestic and sweeping beauty, but it feels like there are no trees! (1m 16s)
Why do waterfalls not run out of water?
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Why do waterfalls not run out of water? Asks Connor from New Zealand. (1m 57s)
Why is Iceland green and Greenland icy?
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Why is Iceland green and Greenland icy? Asks a number of viewers. (2m 39s)
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How are glaciers formed? Asks Eena from British Columbia. (2m 29s)
Are there animals or plants that can live forever?
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Are there animals or plants that can live forever? Asks Eleanor from New York. (2m 25s)
Why does Iceland have so many volcanoes?
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Why does Iceland have so many volcanoes? (1m 46s)
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Why are continents so big? Asks Oscar from New Zealand. (2m 16s)
Providing Support for PBS.org
Learn Moreabout PBS online sponsorshipUh oh, I have a sinking feeling I've walked right into quicksand.
I want to know how you sink in quicksand.
Quicksand has a pretty scary reputation, thanks mostly to movies and TV.
I'm sure you've seen it at some point.
Someone steps i what they think is normal sand and then suddenly sinks to their doom because quicksand swallows them up.
It's not that quicksand wants to eat you.
I mean, it's sand.
It doesn't want anything.
But the reason you sink is because of water saturating the sand and turning it into a sort of fluid like mixture.
Normally sand is solid, right?
But on a micro level, sand is typically elongated instead of spherical.
So more like grains of rice than a lot of mini marbles.
There are spaces between the grains.
Those spaces, or voids, are usually filled by air wate when the conditions are right, like along a riverbank or on a beach.
At low tide, water can flow upward through the sand, causing that sand to become agitated.
And that's how it develops a more fluid like state.
Now, if you step foot on sand, that's just the right mixture of sand and water.
Boom!
You might start to get a little bit stuck, but don't panic.
No, really.
Don't panic.
More movement when you're already in quicksand will cause you to sink even lower and faster, because you're vibrating the sand and shifting the mixture around you.
So if you get stuck in an area where there's rising water, you'll want to get help quickly.
Try to stay calm.
Lean back to increase your surface area and use any nearby objects to help get yourself out.
But don't worry, it will never get bad enoug that someone else will have to dive in with a rope to get you out.
To make sure you never miss But Why, like this video and subscribe to our channel and find out more at butwhykids.org.
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