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Biological systems such as the human body are good at making transparent material, such as the aqueous humor in eyes, and they are also good at making strong inflexible material such as bone, but they are not good at making material that is both transparent and strong. Eyes have to be transparent in order to see, therefore that was the priority, rather than physical strength. Of course, we do know how to make glass, which is both transparent and strong, but that is technology, not Biology. Biological systems haven't figured out how to make glass.

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14y ago

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