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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
Blood is approximately twice as thick as water because of the cells and other components found in it.
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