The Giant Impact Hypothesis posits a Mars-sized planetesimal, Theia, collided with Earth approximately 4.5 billion years ago, resulting in the formation of the Moon from the ejected debris. Multiple ...

The Great Oxygenation Event, which occurred around 2.4 billion years ago, was one of the biggest transformations of our planet. Before it, there was practically no oxygen in the atmosphere; after, ...

Few topics have been as contentious among both scientists and laypeople as the age of the Earth. Many scientists are people of faith, but from the moment the ancients found seashell fossils high in ...

Smithsonian researcher Wriju Chowdhury is part of an expedition searching for 4-billion-year-old crystals that could uncover the secrets behind Earth’s early history Emma Saaty A remote geologic ...

Grab-and-go missions to asteroids have provided some of the most scientifically valuable samples since the Apollo ...

But in all likelihood, the Earth will not see this time, having been engulfed by the Sun in its red giant phase, around 7.6 ...

Earth Day highlights the actions we can take to address environmental problems. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Earth Day is a ...

We live on a wild planet, a wobbly, erupting, ocean-sloshed orb that careens around a giant thermonuclear explosion in the void. Big rocks whiz by overhead, and here on the Earth’s surface, whole ...