Our Earth’s atmosphere was not always the safe haven it is today. New research, informed by ancient ocean fossils, provides a glimpse into a time when our planet’s atmosphere was inhospitable and ...

Early Earth "seesawed" between clear skies and haze, a new study finds. The research, published online March 18 in the journal Nature Geoscience, found that 2.5 billion years ago, Earth's atmosphere ...

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles within this cloud collided and clumped together, driven by gravity and ...

Bacteria, among the oldest of life forms, have lived in seemingly every possible habitat on the planet, from ocean trenches and mountaintops to hot springs and polar ice. Yet, they have left a limited ...

That raises the possibility that the TRAPPIST-1e exoplanet could also have liquid water and therefore support life.