Polar Ice Caps

7 reasons why Arctic sea ice matters

Spend 2 minutes as a wild polar bear in Alaska

Scientists witness breathtaking polar sunrise over Greenland

Greenland may soon live up to its name

Animated GIFs show the Earth 'breathing'

Plants resurrected after 400 years under a glacier

Arctic sea ice hits yearly max, but still dwindling

NASA's IceBridge mission braves the Arctic

Antarctic science balloon shatters longest flight record

Cool glass houses, melting ice and more in MNN's week in review

Photos of Antarctica reveal shifts in ice

Infographic: Meltdown in the Arctic