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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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.
![Jane Goodall first observed Gombe chimpanzees chewing leaves, then dipping the chewed-up “wadge” int](https://biology-forums.com/gallery/47/medium_269691_26_01_15_5_55_25_204421789.jpeg)
![Bone fractures that occur before death show signs of healing. The process of fracture healing starts](https://biology-forums.com/gallery/47/medium_273688_23_02_15_8_21_24_20896625.jpeg)