Study: Sahara Changed from Wet to Dry Every 20,000 Years - VOA Learning English
Voanews.com - Mon 7 Jan 01:26 GMT

Study: Sahara Changed from Wet to Dry Every 20,000 Years - VOA Learning English

A new study suggests climate conditions in the Sahara Desert has changed from wet to dry about every 20,000 years.

  A new study suggests climate conditions in the Sahara Desert have changed from wet to dry about every 20,000 years.

  The research showed that during that period, the Sahara’s climate kept changing between wet and dry about every 20,000 years.

  McGee told MIT News the new evidence supports the idea that the area’s climate repeatedly kept changing over the years.

  Researcher David McGee told MIT News that today we only see the Sahara Desert as an extremely desolate and “inhospitable” place.

  Write to us in the Comments section, and visit our Facebook - Study: Sahara Changed from Wet to Dry Every 20,000 Years Start the Quiz to find in This Story desolate – adj. an empty, lonely and sometimes sad place fossil – n. part of an animal or plant from thousands of years ago that has been preserved in rock dominant – adj. main or most important sediment – n. solid substance that forms a layer at the bottom of a liquid layer – n. an amount of a substance covering a surface, with each on top of the other inhospitable – adj. not pleasant or easy to live in because of extreme conditions disperse – v. to separate and go in different directions