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Author Question: How many years behind in reading development is the following student? Independent Level 2 ... (Read 1157 times) |
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Vaccines prevent between 2.5 and 4 million deaths every year.
Green tea is able to stop the scent of garlic or onion from causing bad breath.
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.
Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.