atmosphere

Events called inversions make for spellbinding views—or long-lasting haze.

The Earth may have hit a new three-million-year record.

Bacteria and fungi were hurled into Earth’s middle stratosphere, which resembles many of Mars’ harsh conditions.

That light breeze could mean there’s a storm a few miles away.

The strange effect is now creeping over to the East Coast.

The act could even reveal how to look for life on alien planets.

Humpty Dumpty’s lucky he only fell off a wall.

Here's where our O2 really comes from.

There’s more carbon in the atmosphere now than there was before the dawn of mankind.

Five reasons you shouldn't take cloud cover for granted.