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.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.
American Staffordshire Terrier
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The “Old Man” from La Chapelle shows evidence of extensive tooth loss and bone resorption.
Age at First Sign of Psychotic Symptoms in Schizophrenic Patients
If their caregivers sign to them, deaf children will imitate these signs and “babble” in sign, ...
An overview of the 5 types of gain, loss, or rearrangement of chromosome