Geologic Time is a crucial concept to understanding the history of the earth—including the evolution of life. ... When many species went extinct around the same time, that might be marked as a change ...

Geologists have added a new period to their official calendar of Earth's history - the first in 120 years. The Ediacaran Period covers some 50 million years of ancient time on our planet from 600 ...

Geologists break down our planet’s history into eons, eras, periods, epochs and ages — with an eon being the largest chunk of time and an age the shortest. For example, we currently live in ...

New Method of Calculating the Duration of Geological Periods On supporting science journalism If you're enjoying this article, consider supporting our award-winning journalism by subscribing .

POCATELLO, Idaho (KIFI) – An Idaho State University professor’s research is tackling one of the hottest debates in geology: Has human activity changed the planet enough to mark a new geologic ...