Overview
About 20% of the Earth is a desert. Deserts are places that get very little precipitation (rain or snow) each year, and that makes them extremely dry. Deserts cover big areas of land. The biggest desert, the Sahara, extends from North Africa to Southwest Asia and is 13 times the size of Texas. Some parts of the Sahara get as little as 2 millimeters (0.08 inches) of water a year.
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4 - 1Rivers & Streams November 03, 1995 -
4 - 2Nutrition November 10, 1995 -
4 - 3Marine Mammals November 17, 1995 -
4 - 4Earthquakes November 24, 1995 -
4 - 5NTV Top 11 Video Countdown December 01, 1995 -
4 - 6Spiders January 05, 1996 -
4 - 7Pollution Solutions January 12, 1996 -
4 - 8Probability January 19, 1996 -
4 - 9Pseudoscience January 26, 1996 -
4 - 10Flowers January 27, 1996 -
4 - 11Archaeology January 28, 1996 -
4 - 12Deserts January 29, 1996 -
4 - 13Amphibians January 30, 1996 -
4 - 14Volcanoes January 31, 1996 -
4 - 15Invertebrates February 07, 1996 -
4 - 16Heart February 14, 1996 -
4 - 17Inventions February 21, 1996 -
4 - 18Computers April 25, 1996 -
4 - 19Fossils September 05, 1997 -
4 - 20Time September 12, 1997