Curated by ACT
Why is your grandmother always wondering if you are drinking enough milk? Our bones are made out of calcium, a mineral found in milk, and drinking milk can lead to strong healthy bones. What about other animals? What are their bones made of? Are endoskeletons and exoskeletons made out of the same materials?
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- Knovation Readability Score: 3 (1 low difficulty, 5 high difficulty)
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