Known today as the “Black Belt,” the southeastern United States was once covered by an ancient sea—one that continues to ...

Smithsonian scientists and researchers work to understand the natural history of Earth. They explore how the Earth and its inhabitants have changed and adapted over time. They explore questions about ...

These are but a few of the puzzling events that lead some scientists to believe life on Earth may be pushed to ... the majestic wilderness of Yellowstone National Park is also showing signs ...