This week's subject: National Parks

It was the first of its kind in the world. Established in 1872, Yellowstone National Park ha more geysers and hot springs than anywhere else. And it has the highest concentration of mammas in the lower 48 states. As the firs of more than 350 such areas in the UnitedStates, Yellowstone inspired the creation of national parks throughout the world. To learn more, students and others can use the direct links on The Times' Launch Point Web site. Go to: http://www.latimes.com/launch/

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