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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.