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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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Do You Think 13 Is Unlucky?
Was that a black cat? Watch out! Whew! That was close. We hope we’re lucky enough to make it through this Wonder of the Day!
Do You Think 13 Is Unlucky?