|
|
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.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.
A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.
![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)
![The early development of the mammalian brain illustrated in schematic horizontal sections. Compare ...](https://biology-forums.com/gallery/30/medium_548020_02_06_17_12_10_55_302161893.jpeg)