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How Fast Is the Speed of Light?
Superman may have been faster than a speeding bullet, but he doesn’t stand a chance in a race against light!
How Fast Is the Speed of Light?
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Who Is the Unknown Soldier?
We’d love to tell you who today’s Wonder of the Day is about, but unfortunately we don’t know.
Who Is the Unknown Soldier?
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What is Smallpox?
Today’s Wonder of the Day is no SMALL problem.
What is Smallpox?