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What Makes Ink Permanent?
Today’s Wonder of the Day isn’t written in stone, but we think it will stick around for quite a while!
What Makes Ink Permanent?
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Who Invented the Hard Drive?
You probably store memories in your brain, but do you know how a computer stores memory? Find out today in Wonderopolis!
Who Invented the Hard Drive?
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How Does Bluetooth Work?
Today’s Wonder of the Day is totally wireless!
How Does Bluetooth Work?