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Asthma cases in Americans are about 75% higher today than they were in 1980.
The longest a person has survived after a heart transplant is 24 years.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
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.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
![A young Lipizzan at the Spanish Riding School in training equipment, wearing saddle, bridle and long](https://biology-forums.com/gallery/47/medium_27638_22_04_12_8_43_50.jpeg)
![Robert K. Merton (1910–2003), who spent most of his academic career at Columbia University, was a ...](https://biology-forums.com/gallery/47/medium_599494_07_11_16_11_58_24_240941884.png)