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Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Cyanide works by making the human body unable to use oxygen.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.