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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.