Why do dogs wag their tails?
Brains On! Science podcast for kids
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The Sound of Your Cat Purring
Producer Mark Sanchez sent in a mystery sound he heard from his dog Ella. If you were going to send in a Mystery Sound of your cat, it would probably be her purring. These are the incredible kids who keep the show going with their questions and ideas. We'll be back next week with more answers to your questions.
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