Your Paw-some Question | Why are giraffes' tongues purple?

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Cosmo and I found out why our tallest animal friends have long, dark tongues—and what melanin does for humans, too. Thanks to Cynthia Cooper, who studies animal pigments at WSU Vancouver.

• Find out more about how DNA works with Amoeba Sisters
• Read my answer about how sunscreen works
• Investigate human skin color with PBS
• Check out prehensile tongues with Cleveland Zoo
• Learn about Cynthia Cooper's zebrafish lab

Sound effects courtesy Pixabay

 As always, submit burning questions at askdruniverse.wsu.edu.  Who knows where your questions will take us next.