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

The inaugural Earth Day, held on 22 April 1970, was strategically scheduled between spring break and final exams to maximise ...

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

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

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

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

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

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

The history of Earth is written on the great tablets of tectonic plates. The motions of plates shaped land masses, formed oceans, and created the varied climates and habitats that set the stage for ...

Tiny bits of Earth’s atmosphere have been drifting to the moon for billions of years, guided by Earth’s magnetic field. Rather than blocking particles, the magnetic field can funnel them along ...

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