It started with a rock that didn’t look like a big deal. Just a dark lump in the Sahara. The kind of thing you could walk ...

A lost cache of 250-million-year-old fossils from Australia has rewritten part of the story of life after Earth’s worst mass extinction. Instead of a single marine amphibian species, researchers ...

These striking before and after images show how quickly landscapes can transform, whether through climate shifts, water diversion, urban expansion, or industrial development. From the Aral Sea to ...

In 250 million years, Earth’s continents may merge into a supercontinent so extreme that most mammals would struggle to survive.

Astronomy does not belong off Earth. It belongs wherever the universe can be observed — and that necessarily includes the surface of the planet humans live on. Kelsey Johnson: Past President of the ...

Snowfall in deserts is mainly the result of sharp temperature swings. Many deserts lie far from oceans or are located at high altitudes, both of which allow heat to escape quickly after sunset. In ...

Unlike a solar eclipse, which occurs when the moon passes between the sun and the Earth, people watching Tuesday morning’s lunar eclipse don’t have to worry about damaging their eyes. Binoculars will ...

Our planet is more unpredictable and more fascinating than most of us imagine. Most countries have one dominant climate, which is maybe a hot desert o.

Stargazers of Arizona, keep your eyes skyward on early Saturday evening for a cosmic spectacle. A rare six-planet alignment will occur on Feb. 28 as Mercury, Venus, Saturn, Jupiter, Uranus and Neptune ...

With some of the world’s clearest skies, the Elqui Valley on the edge of the Atacama Desert offers an unparalleled lens into ...

The sight of an open expanse stretching into infinity is a tonic for clearing cluttered minds. Promising silence, solitude and stark minimalist beauty, our world’s driest regions lure bold explorers ...