Ancient crystals reveal that Earth began recycling its crust and forming continents billions of years earlier than scientists ...

NORFOLK, Va. — In the 1960s, the negative effects of fossil fuel use concerned late Wisconsin Senator Gaylord Nelson. He tapped a young activist named Denis Hayes to help push a movement to reduce the ...

As humans alter the planet’s climate and ecosystems, scientists are looking to Earth’s history to help predict what may unfold from climate change. To this end, massive ice structures like glaciers ...

The National Museum of Natural History is among the first eight Smithsonian sites the Trump administration announced it will ...

Jaxon Mercer, Rachel Starr and Alonso Prieto plant a tree as they join with Salt Lake City Department of Public Lands and other community volunteers for a combined Earth Day and Arbor Day celebration ...

It seems the Earth's core may contain more carbon than previously assumed, which changes how we understand its evolution.

April 22 is Earth Day, the annual salute to the planet and its environment. "On April 22, 1970, 20 million Americans...took to streets, college campuses and hundreds of cities to protest environmental ...

While the planet has experienced much warmer periods in the past, scientists have found that the current rate of temperature rise is much faster than any warming seen in the last 65 million years.

On August 23, 1966, NASA’s Lunar Orbiter 1 captured the very first photograph of Earth from the vicinity of the Moon, showing ...

A study by researchers at the University of Oxford, University of Leeds, and University College London has identified a new ...

Mars is known for its barren desert landscape and dry climate. But two recent studies in the journals Nature and Science go ...

Smithsonian researchers analyzed fragments of the near-Earth asteroid and discovered water-rich clays that hint at a distant ...