Dogs are pretty much guaranteed to find the smelliest stuff to roll in -- but why? Learn what may be behind this gross instinct in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/pets/dogs-love-rolling-in-stinky-stuff.htm

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The Santa Anas are winds that sweep hot air over Southern California, both clearing the air and exacerbating wildfires. Learn how they work in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/nature/climate-weather/atmospheric/santa-ana-winds.htm

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It turns out that as a species, alligators have remained unchanged for millions of years longer than anyone knew. Learn how researchers discovered this in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/reptiles/alligator-species-8-million-years-old.htm

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Cabin pressure systems haven't changed much over the decades, but the controls for them have gotten safer and more sensitive. Learn more in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/transport/flight/modern/airplane-cabin-pressure.htm

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When you freckle or tan, your skin is trying to protect you from damage. Learn how it works in this episode of BrainStuff.

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Echidnas are spiny, toothless, egg-laying mammals -- and they only get weirder from there. Learn more about them in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/echidna.htm

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When a shortage of baby formula strikes, health-care providers and a number of organizations can help. Learn who to contact, and what switches in formula are safe for babies, in this episode of BrainStuff, based on this article: https://lifestyle.howstuffworks.com/family/parenting/babies/baby-formula-shortage-news.htm

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The most popular modern bidet was invented in the U.S., so why hasn't this technology caught on here? Learn the history of the bidet in this episode of BrainStuff, based on this article: https://home.howstuffworks.com/bidet.htm

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Even though Earth is the largest rocky body in our solar system, we don't have the largest mountain -- not by a long shot. Learn how Mars took the title in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/tallest-mountain-in-solar-system.htm

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A study investigating the microbes and bugs in chimpanzee beds versus human beds showed that chimps are cleaner than we are. Learn about the study's results in this classic episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/bed-has-more-poop-than-chimps.htm

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