Researchers are still puzzling through what happened to the ancient Maya civilization, which mysteriously dwindled. New ...

“Great civilizations are not murdered. Instead, they take their own lives.” The great historian Arnold Toynbee concluded this in his 12-volume magnum opus A Study of History. It was an exploration of ...

Add Yahoo as a preferred source to see more of our stories on Google. (Esben_H/iStock/Getty Images Plus) The Fermi paradox asks: If there are other civilizations in the Universe besides ours, why ...

We preselected all newsletters you had before unsubscribing.

It is one of the most famous questions in science, and it was asked, as legend has it, over lunch. Enrico Fermi, the physicist who helped build the first nuclear reactor and whose name graces a unit ...

This rationale explains why we love stories about the end of the world. In these books, Earth has turned into an inhospitable ...

WASHINGTON (Reuters) - For a clue to the possible impact of climate change on modern society, a study suggests a look back at the end of classic Maya civilization, which disintegrated into famine, war ...

Add Yahoo as a preferred source to see more of our stories on Google. President Trump warns a "whole civilization" could die as his deadline for Iran to strike a deal and reopen the Strait of Hormuz ...

The Fermi paradox asks: If there are other civilizations in the Universe besides ours, why haven't we yet made contact? Researchers who study this paradox – also called the Great Silence – generally ...