Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust ...

In preparation for the summer road trip season, historian Allen Pietrobon joins Smithsonian Associates on April 28 to discuss ...

In a surprising new discovery, scientists have found that the underside of the North American continent is slowly “dripping” away—like blobs of rock melting off into the Earth’s mantle. This strange ...

One of the most exciting programs is America’s Field Trip, a contest that gives students a chance to share their perspectives and win a trip to some of the nation’s most historic and cultural ...