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

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

Two mysterious blobs deep inside Earth may hold clues about the origin of life on our planet, new research finds. Deep beneath Earth's crust, in the mantle, lie two continent-sized blobs. These ...

But the very heart of our planet remains a mystery. For many years, scientists believed that iron and nickel made up Earth’s ...

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

Grab-and-go missions to asteroids have provided some of the most scientifically valuable samples since the Apollo missions—and they’re shaking up the search for life beyond Earth. The OSIRIS-REx ...

A river on fire in Ohio, a massive oil spill in California and a senator fighting for change: This is the story of how Earth ...

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