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Medication errors are three times higher among children and infants than with adults.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.