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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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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Letters and Numbers Letters and Numbers
Functional MRI Scans These scans of human brains show localized average increases in neural activity Functional MRI Scans These scans of human brains show localized average increases in neural activity
Subtle Differences in Written Words Subtle Differences in Written Words
The number of words correctly completed in the New York Times crossword puzzle increases with age ... The number of words correctly completed in the New York Times crossword puzzle increases with age ...
Common Root Words and Combining Forms Cont Common Root Words and Combining Forms Cont
essay on friendship written by a 10-year-old essay on friendship written by a 10-year-old
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

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