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

Here's what to know about Earth Day 2026 and how the holiday came to be.

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

Millions of people around the world will pause Wednesday, at least for a moment, to mark Earth Day. It's an annual event ...

A new book called The Burning Earth: A History takes on a massive question: How did we get here? “Here” being this point in environmental history and decades deep into the climate crisis. Over the ...

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

The Smithsonian partners with NASA to present the Earth Information Center, a larger-than-life display that visualizes interconnected changes on the planet Jack Tamisiea The museum's newest exhibition ...

Earth has never stood still. Over its 4.5 billion years of history, our planet has been reshaped by different cataclysms and climate shifts. The atmosphere went through several changes, oceans froze ...

Scientists could be on the verge of discovering the explanation behind one of the strangest questions about our planet. Through the use of state-of-the-art technology, this could provide answers about ...