Scientists say they have found geochemical traces of Earth’s ancient self hidden far below our feet, suggesting that parts of the planet that existed before the Moon-forming collision 4.5 billion ...

In a remote desert, scientists have discovered one of Earth’s oldest asteroid impacts. It dates to well over a billion years ago, to a time when our planet was inhabited solely by single-celled life.

To better understand the circadian clock in modern-day cyanobacteria, a research team has studied ancient timekeeping systems. They examined the oscillation of the clock proteins KaiA, KaiB, and KaiC ...

By resurrecting a 3.2-billion-year-old enzyme and studying it inside living microbes, researchers at the University of ...

Mass extinction events throughout Earth’s history are characterized as significant disruptions to life on the planet. There ...

A drawing of an orange, cloud-covered planet against a black background During the Archean Eon, 4-2.5 billion years ago, Earth likely looked very different than it does today. Its hazy skies may have ...

An electron microscope image, colorized, shows different structures of pollen grains, including sunflower, morning glory and primrose. Dartmouth Electron Microscope Facility If pollen allergies are ...

The earliest days of Earth held secrets that scientists are still trying to uncover. One of the greatest mysteries is how life began. A key part of the answer lies in a rare element: phosphorus. This ...

Ancient Moon dust, meteorite traces and Apollo samples are helping NASA scientists rethink where Earth’s water truly came ...