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In 1864, the first barbiturate (barbituric acid) was synthesized.
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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).
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There are more bacteria in your mouth than there are people in the world.
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If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.
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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.
The frequency of competition according to the number of species involved.
24 weeks old human fetus
Respiration in human
Human skull
The dimensions of a typical bolt showing where sizes are measured.
Human civilization developed during the most recent interglacial stage