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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.
As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.