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Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Asthma cases in Americans are about 75% higher today than they were in 1980.
The average adult has about 21 square feet of skin.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.