The Meadowcroft Rockshelter and Historic Village, the oldest site of human habitation in North America, is opening its new ...

A long-lost slab of Earth’s crust may be pulling away the bottom of the oldest part of North America, scientists say ...

Researchers have discovered that the underside of the North American continent is dripping away in blobs of rock—and that the ...

When Maureen Long talks to the public about her work, she likes to ask her audience to close their eyes and think of a ...