How Does Saliva Work?

After years of trench warfare in WWI, France built a line of massive underground bunkers and other defensive fortifications along hundreds of miles of its border. Learn how the Maginot Line worked -- and why it failed to stop the Nazi invasion -- in today's episode of BrainStuff, ...  Show more

Some U.S. cities and states have officially changed Columbus Day to Indigenous Peoples' Day. Learn why -- and why some Americans disagree with the change -- in this classic episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/holidays- ...  Show more

The slimy substance is so powerful that doctors once made hog stomach mucus milkshakes to treat ulcers. Learn more about your ad choices. Visit megaphone.fm/adchoices 

The slimy substance is so powerful that doctors once made hog stomach mucus milkshakes to treat ulcers. Learn more about your ad choices. Visit megaphone.fm/adchoices 

A look at the evidence that links the health of our mouths with the rest of our bodies. 

Find out about the bacterial life of a passionate kiss as Robert and Julie explore the human smooch. Is kissing instinctual and learned, and what does it have to with food, if anything?