|
|
The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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.
Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
In 1864, the first barbiturate (barbituric acid) was synthesized.
The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
![Relaxed ear position of a bored or resting horse. Lower lip is loose, also indicating relaxation. Th](https://biology-forums.com/gallery/47/medium_27605_22_04_12_7_15_54.jpeg)
![Body cavities. (A) Lateral view of a sagittal section through the body. (B) Anterior view of a front](https://biology-forums.com/gallery/47/medium_14755_20_09_12_5_58_20_885570.jpeg)