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Why Do Airplanes Leave Tracks In the Sky?
What’s that? Up there in the sky! It looks a bit like a cloud. Find out more today in Wonderopolis!
Why Do Airplanes Leave Tracks In the Sky?
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Do Birds Get Shocked When They Sit on Wires?
Today’s Wonder of the Day might shock you! Or it might not…
Do Birds Get Shocked When They Sit on Wires?