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In page National Center for Atmospheric Research:

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The Visitor Center at the Mesa Laboratory is open to the public daily at no charge. Guided tours and self-guided tablet tours include video and audio on one of the first supercomputers built by Seymour Cray as well as NCAR's modern supercomputer fleet, many hands-on educational exhibits demonstrating weather phenomena and the changes in Earth's climate brought on by global warming, and a scenic outdoor weather trail.[citation needed]