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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
In 1864, the first barbiturate (barbituric acid) was synthesized.
Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.