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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.