Scientists predict Earth's days could stretch to 25 hours in 200 million years as the Moon's gravity gradually slows the ...

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 ...

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

Scientists have found that the crust beneath East Africa’s Turkana Rift is thinning to a critical point, signaling that the ...

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

Understanding how to explore hidden glaciers on Mars begins not in a laboratory, but in remote field camps across Alaska and Wyoming.

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

Deep within Earth’s core, scientists are uncovering signs of a hidden structure that challenges long-standing models of the planet’s interior.