We have learned an enormous amount about our planet’s climate system by studying Earth’s modern and recent history -- roughly the last two million years, and particularly the last 10,000 to 100,000 ...

More than one billion people participate in Earth Day, making it the largest civic observance in the world. This year, make sure you join in on the action. Celebrated annually on April 22, Earth Day ...

EarthDay.org started the battle for climate education April 22, 1970 — the very first Earth Day — and continues to fight for it 54 years later. Right now, the organization is working in every state in ...

Over four millennia ago, in the final days of the Akkadian Empire in Mesopotamia, a drought swept over the region, afflicting lands as far away as Greece and what’s now Pakistan. Probably driven by ...

In 1970, the first Earth Day sparked a massive public response, with 20 million Americans taking to streets and college campuses to speak out against air and water pollution, wilderness loss, and ...

Early in 1993, a manuscript landed in the Nature offices announcing the results of an unusual — even audacious — experiment. The investigators, led by planetary scientist and broadcaster Carl Sagan, ...

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 ...

In April 2029, a 20-million ton asteroid once thought to pose a potentially catastrophic collision risk with the Earth will fly by our home. Apophis, named for the Egyptian god of chaos and evil and ...

Though my feet have remained on Earth the entirety of 2025, my mind spent a surprising amount of time in space.