A 'pacemaker' for North African climate
Researchers have analyzed dust deposited off the coast of west Africa over the last 240,000 years, and found that the Sahara, and North Africa in general, has swung between wet and dry climates every 20,000 years.
from Latest Science News -- ScienceDaily http://bit.ly/2RuhHKR
from Latest Science News -- ScienceDaily http://bit.ly/2RuhHKR
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