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Thyroid conditions may make getting pregnant impossible.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.