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

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

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

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

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

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

As Earth's 8 billion inhabitants beam well wishes up to the sky, the crew of NASA's Artemis II mission is looking back at us with just as much hope. The mission's Orion spacecraft sent back its first ...

Scientists have seemingly settled long-standing arguments about whether the components of Earth originated from the inner or ...

From tiny zircons to deep mantle processes, scientists are piecing together a vivid picture of Earth’s earliest days. New research reveals how continents, minerals, and even the building blocks of ...