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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
There are more nerve cells in one human brain than there are stars in the Milky Way.
The familiar sounds of your heart are made by the heart's valves as they open and close.
Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.
The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
![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)
![The legacy of Confucian thought continued for centuries in the form of civil service examinations ...](https://biology-forums.com/gallery/47/medium_660366_21_03_17_2_37_00_273051798.jpeg)