|
|
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
There are more sensory neurons in the tongue than in any other part of the body.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.