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frog wearing umbrella Photo by Penkdix Palme -- National Geographic Your Shot - A two inch frog shelters itself from the rain in Jember, East Java, in Indonesia.

Bottle Design Brain Melter: The Handle is the Spout, the Opening is on the Bottom, the Inside and the Outside Are the Same Surface

Math teacher need: klein bottle A real Klein bottle is an object with no inside and no outside that can only exist in four dimensions. These glass models exist in three, which means that unlike the real thing, they can actually hold liquid.

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Future of intercontinental transportation in Electric system conceived as a hybrid between a plane and a train.

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