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Author Question: Research on the degree to which people within a single culture share knowledge has shown that: a. ... (Read 57 times) |
Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.