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Atoms are so tiny that a speck of dust is half way between its size and the size of the earth
Atoms are so tiny that a speck of dust is half way between its size and the size of the earth
Dust is less often the origin of the floating specs you see in the air. They're actually more often dead skin cells.
Lightning can occur during volcanic eruptions, dust storms, snow storms, forest fires and tornadoes.

Household dust is made of dead skin cells
A typical bed can have up to 10 million dust mites.