Millions of people around the world will pause, at least for a moment, to mark Earth Day. The annual event is Wednesday.

Earth Day is April 22. Here's what to know about how Earth Day happened and how to celebrate our planet this April.

The first Earth Day enjoyed strong participation nationwide and, importantly, motivated officials to take concrete steps to protect our air and water.

In celebration of Earth Day, here are nine wins for the planet in 2026.

Earth Day is celebrated annually on April 22. Learn about its origins, global reach, and this year's theme.

Fifty-six years after the first one rallied 20 million people across America, “we need to do things that make us feel more ...

The space race is accelerating, but its environmental footprint is growing. Discover how space activity is affecting Earth’s ...

Earth responded to its most severe past warming event by evolving a new and bizarre type of photosynthesis that allowed a ...

They're hidden in your smartphone right now. Inside wind turbines spinning across distant fields. Powering the electric vehicles that roll silently past you on the highway. Yet most people don't give ...

Carbon released from Earth's spreading tectonic plates, not volcanoes, may have triggered major transitions between ancient ice ages and warm climates, new research finds. Published in Communications ...

Earth has already exceeded its ability to support the global population sustainably, with new research warning of increasing pressure on food security, climate stability, and human well-being. However ...