Why do we yawn?

Five-sixths of all the matter in the universe is this invisible stuff called dark matter, and scientists barely understand what it is. So what happens if we can't answer arguably the biggest mystery in the universe? One physicist decided to quit because he started asking question ...  Show more

It's a question that seems impossible to grapple with, but scientists won't take no for an answer. In this collaboration with Scientific American, we take on the big bang and a whole bunch of seemingly impossible questions. Guests: Rachel Feltman, host of the Science Quickly podc ...  Show more

Yawning is contagious, but why? Check out the leading theories on contagious yawning and empathy in this HowStuffWorks podcast.

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Is there anything – anything – worse than a yawn you can’t finish? It’s hard to think of anything else and as your obsession with yawning like a normal human being grows it only becomes more difficult. Why? Why?!See omnystudio.com/listener for privacy information. 

Why do we yawn? You might think it is because we are tired or bored. However, according to some research, yawning has nothing to do with either of those things. This episode begins with a look at the real reason we yawn and why yawning is contagious. http://abcnews.go.com/GMA/sto ...  Show more

You probably associate yawning with being tired or maybe being bored. However, according to some interesting research, yawning has nothing to do with either one of those things. I begin this episode of the podcast at a look at why we yawn and why yawning is contagious. http://abc ...  Show more