See stunning photos of Earth taken from space by astronauts and robotic spacecraft, celebrating our home planet on Earth Day.

Millions of people around the world will pause Wednesday, at least for a moment, to mark Earth Day. It's an annual event ...

From its 1970 origins to today’s climate action, here’s why Earth Day is observed each April 22 and what the day represents.

Here's what to know about Earth Day 2026 and how the holiday came to be.

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

Earth Day 2026: History of the global movement fighting for our planet - Millions of people around the world will pause on ...

Earth Day often inspires communities to come together through volunteer work, and 2026 won't be much different.

Fresh takes on Apollo’s famous “Earthrise” and “Blue Marble” images showed off our planet’s beauty just weeks before Earth ...

Astronauts and robotic spacecraft have captured breathtaking photos of Earth from space for decades. See the best images.

This Earth Day, we reflect on our home planet and look at Earth from space through history.

“Pounding earth or making mud bricks out of earth [as opposed to firing clay bricks] is one of the most universal and ancient ...

Bork!Bork!Bork!: Dynamic Earth's ancient rock holds not primordial crystal, but a tiny Linux box having a bad day ...