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Author Question: After grass seeds germinate, the soil should not be allowed to dry out until the grass is what ... (Read 91 times) |
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There are more bacteria in your mouth than there are people in the world.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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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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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.