But that is exactly what roamed around what’s currently northeast Illinois in the late Carboniferous Period about 300 million to 320 million years ago, according to a study published Friday in ...

The Huronian Ice Age, over 2.5 billion years ago, was Earth's first major ice age. In this video, we explore what caused it, what life was like, and how the planet eventually warmed. Join us on ...

The fossil seems to date back toward the end of the Carboniferous period and into the Permian period, which took place about 300 million years ago, Calder told the news agency. Those time periods ...

But a recent study suggests that the timeline actually stretches further back — beyond the evolution of early humans and past the age of dinosaurs — to 200 to 300 million years ago when a hot ...

Few animal fossils have been found in the mine—chemicals in the ancient swamp's water may have dissolved shells and bones—but other sites from more than 300 million years ago, a period known ...

Although mountains began to rise above sea level some 300 million years ago, they were eroded by wind and water to form massive dunes. Eventually the dunes were compacted by erosion into mountains ...