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what is kleine-levin syndrome

What Is Kleine-Levin Syndrome?

KLS is a disease of adolescence, and sometimes will begin after infection or illness, says Tom Rico of the Center for Narcolepsy & KLS…

what is a meteorite

What Is a Meteorite?

What Is a Meteorite? Meteorites begin as bodies of matter traveling at great speed through space. In the solar system there are numberless s

why are fertilizers used on farms

Why Are Fertilizers Used on Farms?

Why Are Fertilizers Used on Farms? Fertilizers are used on farms to increase crop yields by ensuring that soils contain the chemical element