A single tablespoon of soil contains more organisms there are people on Earth.
What Is Dirt Made Out Of?
What is dirt made out of? - Big Questions (Ep. 15)
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Key Facts In This Video
Soil and dirt aren't the same thing. 00:14
Around 45 percent of soil consists of three main components. 00:51
In the U.S. alone there are about 50,000 different types of soil. 01:24
Curiosity StaffFebruary 9, 2015
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