A Tour-Guide Robot Roams a Smithsonian Museum

By JEFFREY R. YOUNG

A robot tour guide, created by researchers, used its winning smile and melodic voice to charm visitors at the Smithsonian Institution's National Museum of American History in a project that ended last week.

The robot rolled through a busy technology exhibit on the first floor, describing artifacts and activating its crooked smile -- actually a red ribbon attached to several motors --

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