Why Is There Sand in Our Eyes When We Wake Up?
Why Is There Sand in Our Eyes When We Wake Up? The “sand” that we sometimes find in the corners of our eyes when we wake up in the morning comes from a...
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Where Does Sand Come from?
Sand is made from tiny grains of rocks and minerals. Almost every grain of sand was once part of a big rock. Heat and cold caused cracks in the rocks, and wind and...
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How Does an Oyster Make a Pearl?
How Does an Oyster Make a Pearl? These beautiful round jewels are the result of a biological process within the oyster as it protects itself from foreign substances....
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