viernes, 1 de junio de 2007

SAHARA


The Sahara At over 9,000,000 square kilometres, it is almost as large as the United States, and is larger than the 48 contiguous states.
The climate of the Sahara has undergone enormous variation between wet and dry over the last few hundred thousand years. During the last ice age, the Sahara was bigger than it is today, extending south beyond its current boundaries.
the collapsing ice sheets to the north.
The Sahara has one of the harshest climates in the world. It has many strong winds that blow from the north-east. Sometimes on the border zones of the north and south, the desert will receive about 25 cm of rain a year. The rainfall happens very rarely, but when it does it is usually torrential when it occurs after long dry periods, which can last for years. Daytime temperatures can be 58 °C.
but freezing temperatures aren't uncommon at night, reaching as low as −6 °C





CREDITS->
wikipedia


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