How (And Why) Do Cats Purr?
Cats purr for all kinds of reasons, including communication and healing themselves. Cristen explains how purring works and which cats can't do it.
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Whether the topic is popcorn or particle physics, you can count on the HowStuffWorks team to explore - and explain - the everyday science in the world around us on BrainStuff.
Download the New TestTube iOS app!
Watch More BrainStuff on TestTube
Subscribe Now!
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