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Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Many seniors pursue new careers, education, and hobbies well beyond what used to be considered ... Many seniors pursue new careers, education, and hobbies well beyond what used to be considered ...
This illustration shows the decibel level in various locations and associated with different ... This illustration shows the decibel level in various locations and associated with different ...
How to solve a linear system when the variable is in the denominator position (Question 1 of 2) How to solve a linear system when the variable is in the denominator position (Question 1 of 2)
Historical gender roles in Canada Historical gender roles in Canada
Denney's model ON actual level of performance on exercised and unexercised abilities Denney's model ON actual level of performance on exercised and unexercised abilities
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Video: Pasteur's Experiment

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