Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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The horizontal fraction bar was introduced by the Arabs.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
The phosphorus cycle. Numbers are 1012 g P or fluxes as 1012 g P per year (data from Schlesinger 199
Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (
A sod house in North Dakota, 1896. Individual “bricks” of sod were hewn from the ground and stacked
Guidelines and Precautions Prior to Beginning a Strength-Training Program
The year 2010 was the hottest since 1880
Genetic polymorphism for foraging behavior in fruit fly larvae