Earth Day began as a protest in 1970, but its meaning has evolved. Here’s how it changed - and what it represents today.

The recent Artemis II mission gave four astronauts a one-of-a-kind perspective on Earth, and their photos show just how small ...

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

Earth Day, which began in 1970, is celebrated each year on April 22.

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

In honor of Earth Day, NASA’s Kennedy Space Center shared an interactive digital tool turns satellite images of the planet’s ...

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

She's focused on healing and finding peace.