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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.