What's black and white and can dive up to 1,800 feet under water? That's right, penguins! Learn this and many other amazing facts about these unique birds with this handy reference sheet.

Lengthy illustrated article about the Arctic Ocean discusses all the many features and characteristics of this vast northern ocean--sea ice, icebergs, ice shelves, ice islands, the Arctic Ocean floor, continental shelf--as well as the...

Discusses the icebergs which are formed off the coast of Greenland and flow through the Northern Atlantic. Contains a link to the International Ice Patrol, a Coast Guard project to monitor large icebergs.

A comparison of the features of ice in the Arctic and the Antarctic. Looks at glaciers, icebergs, pack ice, and multi-year ice.

Describes the properties of seawater and the variations depending on its location, e.g., near a shoreline, in an estuary, or as sea ice. Discusses the instruments scientists use to measure the density of water and explains other...