The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
Amazing NASA Pictures Collection
Example of a collection letter.
Physical Findings of Massive Hemothorax
The relationship between recombination frequency and physical distance between genes