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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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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 familiar sounds of your heart are made by the heart's valves as they open and close.