Before European explorers arrived on the American continents, a diverse array of civilizations, kingdoms, and nations flourished across North, Central, and South America. These societies developed ...

Across deserts, jungles, and polar ice, new discoveries are quietly stretching the story of civilization further back in time than many of us learned in school. As archaeologists debate mysterious ...

It is one of the most famous questions in science, and it was asked, as legend has it, over lunch. Enrico Fermi, the ...