Columbia

Nearly two billion years ago, pieces of Earth's oldest crust came together to form one of the planet's earliest great supercontinents. Its name was Columbia-and its remains are still beneath our feet.

Columbia: The Forgotten Supercontinent explores a vanished world assembled long before Pangaea, when ancient continental fragments known as cratons collided, mountain ranges rose across thousands of miles, and a hotter, more active Earth began building the deep foundations of the continents we ...