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What's The Difference Between A National Park And A National Monument?

While it might seem like a distinction without a difference, there are some good reasons that protected land in the U.S. is divided into these categories.

Chemistry isn't always essential for order: How simple geometry gives rise to complex materials

Utrecht University researchers Rodolfo Subert and Marjolein Dijkstra show in their latest study that complex three-dimensional networks in materials can emerge from nothing more than particle shape.