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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.
Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.