The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,