Showing results for "Extinction" in Ancient

A New York Times–bestselling historian charts how and why societies from ancient Greece to the modern era chose to utterly destroy their foes, and warns that similar wars of obliteration are possible in our time War can settle disputes, topple tyrants, and bend the trajectory of...

Scientists have long attempted to understand Earth’s past, and in service to that effort, they have divided the world’s history into eons, eras, periods, epochs, and ages. For example, the current eon is called the Phanerozoic Eon, which means “visible life”. This is the eon in which multicellular life has evolved and thrived. Before this, life was microscopic (single cells).

The early history of Earth covers such vast stretches of time that years, centuries, and even millennia become virtually meaningless. Instead, paleontologists and scientists who study geochronology divide time into periods and eras.