In this special summer mailbag episode, Marshall and Lindsay help answer three kid questions:

How do stem cells decide what to become?

How do chameleons change color? and...

What is Morse code?

This special episode features answers from Jessica Whited, Michel Milinkovich, and Mick Sullivan, from The Past and the Curious! As well as a roundup of listener reviews, and more!

For more information about Tumble, go visit our website at sciencepodcastforkids.com. To send us a question and get it answered on our show, go to https://tumble.science/Question.

Also support us on Patreon! patreon.com/tumblepodcast

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