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New World Encyclopedia integrates facts with values.

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The US Supreme Court convened for the first time on February 2, 1790. (read more)

Featured Article: Ocean

Animated map exhibiting the world's oceanic waters
An ocean is a major body of saline water, and a principal component of the hydrosphere. Approximately 70 percent of the Earth's surface is covered by saline water forming one continuous body that is customarily divided into several principal oceans and smaller seas. More than half of this area is over 3,000 meters (9,800 ft) deep.

The world ocean, an integral part of global climate, is constantly changing, absorbing heat from the sun and cooling through evaporation, dissolving and releasing carbon dioxide, and moving in great conveyor belt currents transferring heat and moisture toward the poles from the tropics and deep below the surface returning cold water to the tropics. From ocean breezes to monsoons, hurricanes, summer rains, and winter fog, the oceans' heat and water vapor are constantly affecting life on land, even far from the ocean shore.

Popular Article: Algae

A seaweed (Laurencia) up close. The "branches" are multicellular and only about 1 millimeter thick.
Algae (singular alga) are a large and diverse group of photosynthetic, eukaryotic, plant-like organisms that use chlorophyll in capturing light energy, but lack characteristic plant structures such as leaves, roots, flowers, vascular tissue, and seeds. The designation algae includes diverse phyla, including diatoms (golden algae), green algae, euglenoids (flagellates), brown algae, and red algae, and range from single-celled organisms to giant seaweeds. The name alga (plural algae) comes from the Latin word for seaweed. The study of algae is called phycology or algology.

Algae range from single-celled organisms to multi-cellular organisms, some with fairly complex differentiated form and, if marine, called seaweeds. Some of the single-celled organisms may be as small as one micrometer. Multicellular algae may consist of a row of cells, appearing as a filament, or as a thin plate of cells, or even some larger ones may have bodies with a rudimentary division of labor. The multicellular giant kelp reaches 60 meters in length. Seaweeds themselves have many forms, including those that appear as if terrestrial plants with leaves and stems, looking like moss, mushrooms, leaf lettuce, or even palm trees.