The foggy season has arrived in San Diego, often called May Gray and June Gloom. But how does it form, and why does it clear some days and not others?

Evidence is mounting that a secret lies beneath the dusty red plains of Mars, one that could redefine our view of the red ...

"Every year is a little bit different, but what's clear is ... its way into the ocean, resulting in the thermal expansion of ...

Normally, seawater arranges itself into layers determined by water temperature and density ... but what’s clear is that the ...

By studying seismic waves, researchers have found a layer deep beneath the surface of Mars that could contain enough liquid ...

"We calculated the “aquifer layer” on Mars could hold enough water to cover the planet in a global ocean 520–780m deep," said Tkalčić. "Several times as much water as is held in Antarctica ...

We calculated the “aquifer layer” on Mars could hold enough water to cover the planet in a global ocean 520–780m deep — several times as much water as is held in Antarctica’s ice sheet. This volume is ...