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Katarina Zimmer

Katarina Zimmer is a science and environment journalist based in Berlin and a special contributor to Knowable Magazine. Her work has also appeared in the Atlantic, National Geographic, Scientific American, Mongabay, BBC Future and elsewhere. Check out more of her work at www.katarinazimmer.com.

Red-lined Sea Cucumber Thelenota rubralineata in the shallow water near Moyo Island, Sumbawa, Indonesia.
Plants & Animals

Weird and Wondrous Sea Cucumbers

These spiny or slimy ocean creatures display an astonishing diversity of appearances, behaviors and lifestyles. Many are increasingly threatened.

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