Earth’s history is filled with incredible milestones, and the emergence of the first animals is one of the most captivating.

Massive beds of ancient lava found around the world depict an Earth 65 to 70 million years ago where volcanic eruptions were commonplace. According to the volcanism hypothesis, this global-scale ...

Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing over a period of roughly 30 million years, but that would come to a ...

During the past billion years, the Earth's climate has fluctuated between ... For the Cenozoic period, which began about 70 million years ago and continues today, evidence derived from marine ...

A crater at the edge of the Yucatán peninsula in Mexico was created by a massive asteroid that hit Earth 66 million years ago At the end of the Cretaceous Period 66 million years ago, an ...

About 800 million years ago, oxygen levels reached about 21 percent and began to breathe life into more complex organisms. The oxygen-rich ozone layer was also established, shielding the Earth's ...

A new animation showcasing Earth’s evolution has surfaced in a new paper published in the journal Science. The animation was created using a new model, which highlights over 100 million years of ...