Mailbag: How Do Stem Cells Decide What to Become? What's Morse Code?

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 (thepastandthecurious.com)! 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 tumble.science/Question.

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