They're Like Purple Sea Cookies | #DeepLook #Shorts



Most people who pick them up don’t realize that they’ve collected the skeleton of an animal, washed up at the end of a long life. That skeleton -- also known as a test -- is really a tool, a remarkable feat of engineering that allows sand dollars to thrive on the shifting bottom of the sandy seafloor, an environment that most other sea creatures find inhospitable. Learn more in the full episode 👉 https://youtu.be/dxZdBPDNiF4 #shorts #sanddollar #deeplook


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