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Sponges, sea squirts, and worms

Sea squirts

Did anyone ever call you a “little squirt”? They were calling you after a little creature that lives in the sea—the sea squirt. A sea squirt may look like two tubes joined together at the sides….

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Mathemagic

Bridges, mines, machines

A great, shining bridge across a broad river. A vehicle speeding through the cold darkness of space, toward another planet. A new kind of plastic, one that’s tougher than steel. A giant electric…

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Planets, Stars, and Galaxies

Waves from space

Right this minute you’re being hit by “bullets” from outer space! Space is full of waves. These aren’t the kind of waves you see on an ocean, of course. They are waves of radiation. Radiation is…

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