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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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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.