There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.
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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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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
The New Yorker Collection 2004 Carolita Johnson from cartoonbank.com.
This red gasoline container holds about 30 gallons of gasoline and is used to fill vehicles used ...