Researchers have discovered that the North American continent is slowly losing rock from its underside in a process called "cratonic dripping." This is caused by the remnants of the Farallon Plate, an ...

Ancient Greek philosophers envisioned a fourth continent across the Atlantic, anticipating America centuries before Columbus.

North American Beaver at Carburn Park in Calgary, Alberta. Credit: Chuck Szmurlo, Wikimedia Commons Attribution 2.5 The American beaver, Castor canadensis, nearly didn’t survive European colonialism ...