Andrea Mustain

This iceberg is only beginning its journey.

Filmmakers are scouting locations to showcase iconic American spaces.

The sun hasn't shown its face in two months.

Massive geological feature has implications for ice loss.

Map reveals increase in fires as well.

A fault in America's backyard could generate a quake to rival Japan's disastrous 2011 earthquake and tsunami.

The process may bring precious metals within reach.

This whopper of a storm was a rare event.

Smoke is traveling far from the flames.

Alvin is getting a makeover to extend its reach.

The silhouettes of Earth's tectonic boundaries stand out in bright color.

Researchers haven't revised the outlook for the Atlantic hurricane season.

The dive is the deepest ever for three humans simultaneously.

Summer temperatures could be warmer than average across much of country this year.

Scientists got a glimpse of a mid-ocean ridge without taking a dive to the seafloor.

The rainy season is the result of a change in the prevailing wind direction.

Research used surprising source to develop a law to predict a hurricane's movement.

The tornado-track map reveals that the U.S. is a hot-spot for twisters.

Italy isn't Tornado Alley, but twisters can happen anywhere the conditions are right.

The attempt marks a game-changer for state-sponsored deep-sea exploration.

This 'lady' was a whopper.

It may seem like a snooze, but it started with a bang.

These shy animals have almost never been captured on film.

But nobody is off the hook and officials urge preparedness.

A visual aid makes this exponential scale a lot clearer.