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How is a beeping sound produced?
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I’ve found a lot of fossilized horn coral in New Mexico. The outside is stone but the inside is often crystallized, like a purple-ish quartz. Why is the inside of the coral so much harder than the brittle outside?
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How is a beeping sound produced?
9
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I’ve found a lot of fossilized horn coral in New Mexico. The outside is stone but the inside is often crystallized, like a purple-ish quartz. Why is the inside of the coral so much harder than the brittle outside?
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