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The Sahara desert is booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice as old as we thought. Science booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice say the Sahara is around three million years old. However, a new booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice from a centre for climate booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice says it could be seven million years old. Researchers used booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice to calculate when parts of North Africa became desert. Their booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice showed that global warming seven million years ago dried a lot of the booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice in what is today's Chad. A sea called the Tethys Sea started booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice. This cut the number of booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice monsoons, which helped make sand booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice in Chad. The scientists say this is how the Sahara started.

The Sahara is one of the best-known and booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice deserts. It covers about 10 per cent of Africa. It is very big in Algeria, Chad, Egypt, Sudan and other booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice. It stretches from the Atlantic Ocean in the west to the Red Sea in the booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice. Not everyone thinks the Sahara is seven million years old. A booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice in Germany says more booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice is needed to be booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice. He said the new research is just based on booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice. He said: "Nothing you can find in the Sahara is older than 500,000 years old". Our booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice of the Saharan booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice starts from 10,000 years ago. That knowledge is "full of booksclimatecomputersduneseastevidencegapsgeologistknowledgelandlargestnationsnumbersresearchshrinkingstudysummersureteststwice".