Scientists have discovered potential patches of Earth's ancient crust ... Earth's atmosphere went through a sequence of oxygenation episodes fueled by geological and biological interactions ...

The oxygenation of the Earth’s atmosphere and oceans and the emergence and evolution of life are pivotal episodes in the planet ... light on the evolution of ancient marine environments.

“Until now, the absence of any truly ancient craters means they are largely ignored by geologists. “This study provides a crucial piece of the puzzle of Earth's impact history and suggests ...

This ancient period of deep freeze, known as the Neoproterozoic Era, or “Snowball Earth,” lasted from about 1 billion to 543 million years ago. During that time, landmasses consolidated into a ...

An ancient slab of Earth's crust buried deep beneath the Midwest is sucking huge swatches of present-day's North American crust down into the mantle, researchers say. The slab's pull has created ...