Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Did you know?
The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
A parish nurse checks the blood pressure of a church member
Nose Size
Imitation in an Infant
Bracing the head while applying pressure to the neck.
