3-9 ┊ 3086 words ┊ ◄))
3-9, 3086 words, 28 minutes audio time.
Super-speed always keeps the Man of Steel one step ahead of his enemies. But what is speed? And can anyone or anything in our world move as fast as Superman? Get ready to find out with the help of the World’s Greatest Hero. You’ll be amazed by how much you can learn about the science of speed.
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