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Small, shelled, and unassuming, chitons have eyes unlike any other creature in the animal kingdom.
Eye spots on shells evolved 4 times independently
Eyespots evolved in one group of chitons as early as 260 to 200 million years ago
Eyespots evolved again in another group evolved in the Jurassic some 200 to 150 million years ago
Then, shell eyes evolved another time between 150 to 100 million years ago, during the Cretaceous
Lastly eyespots evolved 75 to 25 million years ago
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Using 3-D Printed Mother-of-Pearl to Create Tough New Smart Materials
Using 3-D Printed Mother-of-Pearl to Create Tough New Smart Materials
The silvery shine of mother-of-pearl has long been prized for jewelry and decorative arts. But the interior of mollusk shells, also known as nacre, is more than just a pretty face. It is actually one of the most robust materials in the natural world. You can drive over nacre with a truck, and while the mollusk shell might crack under the weight, the shiny interior will stay intact.
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