Explore 25 Major Events in Earth's 4.5 Billion Year History. Discover pivotal moments from its formation to the rise of life.

If the Entire History of Earth Were Just One ...

Life made the modern Earth as much as the Earth made life, a new book by a philosopher of consciousness argues. That dynamic leaves humans with a unique set of moral questions, Peter Godfrey-Smith of ...

Earth is the only planet known to support life. Learn about what Earth is made of and where it came from. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

Learn about how Earth’s history is written in its rocks with this excerpt from “How to Read a Rock” Jan Zalasiewicz The pine tree, in this age-old relationship, is supported by the rock, and gains ...

In a geological period 469 million years ago known as the Ordovicium Period, Earth's seas were inhabited by animals like trilobites (reminiscent of pillbugs), conodonts (eel-like vertebrates) and ...

In the whole history of Earth's climate, few events are as extreme as those that geologists call "Snowball Earth." "These are times when geologic evidence indicates Earth froze over, essentially from ...

Millions of people around the world will pause Wednesday, at least for a moment, to mark Earth Day. It's an annual event founded by people who hoped to stir activism to clean up and preserve a planet ...

Earth Day 2026: History of the global movement fighting for our planet - Millions of people around the world will pause on Wednesday, at least for a moment, to mark Earth Day ...