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

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

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

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

Beach cleanups, tree planting, and recycling drives mark Earth Day – a global day of action for the environment – each year.

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 ...

Earth Day is celebrated across the country, and the globe, through the mobilization for environmental causes. While it may seem strange to think of a world without ecological awareness, there was once ...

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

When geologist John Wesley Powell explored the Grand Canyon in 1869, he noticed a glaring omission in the rocks. A layer of rock just 520 million years old sat directly on top of ancient rock dating ...

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

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

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 ...