Sixty-six million years ago a 10-kilometer-wide space rock fell out of the sky over what is now the Yucatán Peninsula in the Gulf of Mexico. When it hit Earth, it blew a Maryland-sized hole in the ...

Have you ever wondered how we got here on Earth, and how it all began? From the Archean Eon to the Holocene Epoch, some pretty amazing stuff has happened. Check out this SciShow mini-series hosted by ...

A rapid increase in oxygen levels about 2.5 billion years ago was linked to the evolution of photosynthetic organisms, but geological factors likely started this process. Earth’s early atmosphere was ...

Researchers uncovered that trace compounds like nickel and urea may have delayed Earth’s oxygenation for millions of years. Experiments mimicking early Earth revealed how their concentrations ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. We’ve pieced together a remarkably detailed timeline of ...

A complex web of interactions between geological features including volcanoes, subsurface mantle, oceans and the atmosphere created the chemical mixture necessary for early life to oxygenate our ...