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icebergs

Iceberg
Image: National Geographic/Claus Possberg

Iceberg

Icebergs are freshwater ice floating in seawater. Roughly 1/9th of the ice is actually visible above the surface of the water — the rest is lurking out of sight.

Icebergs can be unstable and hazardous. How are icebergs made? How big can they be? And how long can an iceberg float? Get the details.

National Geographic
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Life Beneath the ‘Berg

Life Beneath the ‘Berg

Icebergs deposit iron into the sea, which boosts tiny plant and algae growth. How does carbon enter into this process? Find out in this exploration of the Antarctic climate cycle. More...

Article
Science News for Students
Watching the Birth of an Iceberg

Watching the Birth of an Iceberg

In 2011, scientists discovered an 18-mile-long crack in a massive glacier in Antarctica. They documented the growing rift through ice, waiting for an iceberg to be created. More...

Video
NASA
‘Iceberg Tsunami’ Filmed Aboard Boat

‘Iceberg Tsunami’ Filmed Aboard Boat

Icebergs are massive hunks of ice that break off of a glacier. But they also break apart. Watch what happens when a big chunk of an iceberg breaks off a little too close to a boat. More...

Video
CBC
Flipping Icebergs

Flipping Icebergs

Iceberg flipping sounds impossible. In fact, it's pretty common. When an iceberg flips over, it releases a tremendous amount of energy. More...

Article
Science News for Students
Iceberg Shapes

Iceberg Shapes

You can learn a lot from the shape of an iceberg. Explore this image gallery to see the three main shapes. More...

Images
Exploratorium
Iceberg Twice the Size of Manhattan Breaks Off Glacier in Greenland

Iceberg Twice the Size of Manhattan Breaks Off Glacier in Greenland

In the summer of 2012, an iceberg the size of Manhattan island broke off of Greenland. What caused it to happen, and what are the consequences? Read more to find out. More...

Video
NPR
Locating Icebergs with Satellite Images

Locating Icebergs with Satellite Images

Satellites are now used to track icebergs and keep ships safe. Follow the directions on this site to see if you can be an iceberg hunter. More...

Interactive
NASA
Operation Iceberg

Operation Iceberg

A team of scientists and filmmakers traveled to the Antarctic to study icebergs above and below the water. Browse the various clips on this site to see what they discovered. More...

Video
BBC

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