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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.
All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
There are 60,000 miles of blood vessels in every adult human.
Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
![Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery](https://biology-forums.com/gallery/47/medium_375348_18_08_15_9_36_29_223002244.jpeg)
![A William Jennings Bryan poster alludes to religion: “no crown of thorns” and no “cross of gold.” Br](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_16_36_2244824.jpeg)