Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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There are more bacteria in your mouth than there are people in the world.
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There are 20 feet of blood vessels in each square inch of human skin.
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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
Gasteracantha mammosa spiderlings next to their eggs capsule
Use of the tympanic thermometer to measure body temperature.
Temperature Conversions
Nonlinear increase in saturation vapor pressure with increase in temperature.