Divisions of geologic time The geologic time scale is divided into chronostratigraphic units and their corresponding geochronologic units. An eon is the largest geochronologic time unit and is equivalent …

In formal usage, eons are the longest portions of geologic time (eras are the second-longest). Three eons are recognized: the Phanerozoic Eon (dating from the present back to the beginning of the …

Eons is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and Vizio.

Andrew Paul, Popular Science, 26 Nov. 2025 People have been settling in Taos for centuries, eons, inspired to create a life there, in some cases with their own ideas about protecting, enhancing, and …

Eons are the largest units of geologic time, spanning hundreds of millions to billions of years, and each represents a significant phase in Earth's history. Eon is the equivalent of a chronostratigraphic …

May 13, 2025 · Geologic time spans are divided into units and subunits, the largest of which are eons. Eons are divided into eras, which are further divided into periods, epochs, and ages.

Eons are subdivided into eras, which further break down into periods, epochs, and ages. The concept of eons helps scientists understand the major events that have shaped the planet over vast timescales, …

Complex chemical interactions between body and mind that evolved eons ago may drive us to eat whenever possible. The couple have been married for 20 years - that's eons in Hollywood terms.

Feb 13, 2023 · The answer is the geologic time scale, a system that divides Earth’s history into eons, eras, periods, and epochs. It’s the timeline that connects rocks to time — and time to life.

Jan 11, 2025 · The four eons are the Hadean, Archean, Proterozoic, and Phanerozoic. The Hadean era lasted around 600 million years and includes the formation of the Earth and Moon.