Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The human body produces and destroys 15 million blood cells every second.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
A soil surface crust that includes nitrogen-fixing, soil-enriching cyanobacteria.
Soil bulk density
Soil as Habitat
Deepwater Horizon Oil Spill
Describe the functions of fat in the body
Describe the Conceptual Forecasting Framework in your own words.