Bring together the strangest and most important polar science.
The Arctic and Antarctica look similar in photographs but are very different. One is mostly ocean surrounded by land, while the other is a continent surrounded by ocean. Their wildlife, people, climate, and geology reflect that contrast.




The Arctic is mostly ocean, while Antarctica is a continent.
Learn MorePolar bears live only in the Arctic.
Learn MoreDeserts are defined by low precipitation, not heat.
Learn MoreAntarctica stores most of Earth's freshwater ice.
Learn MoreAt the poles, the Sun rises and sets only about once each year.
Learn MoreFreshwater ice is less dense than seawater.
Learn MoreArctic warming exceeds the global average.
Learn MoreCold does not mean lifeless.
Learn MoreThat difference affects temperature, wildlife, human settlement, and ocean circulation.
Penguins occur naturally in the Southern Hemisphere, so wild polar bears and penguins never meet.
The Antarctic interior receives extremely little snowfall.
If all of it melted, global sea level would rise by many tens of meters.
This creates months of continuous daylight followed by months of darkness.
Only a fraction of an iceberg usually rises above the surface.
Sea ice and snow feedbacks are important reasons.
Plankton, fish, birds, seals, whales, microbes, plants, and people form complex polar ecosystems.