Mother-of-pearl is not always white. It can be pink, blue, purple, gray, or even green. Nor is it produced only by the pearl oyster. The abalone and the pearl mussel both have shells that are lined with fine-quality mother...Read More
Snails produce a colorless, sticky discharge that forms a protective carpet under them as they travel along. The discharge is so effective that snails can crawl along the edge of a razor without cutting themselves.
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