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Author Question: In a reflecting telescope the objective is a ____. a. prism b. mirror c. lens d. diffraction ... (Read 40 times) |
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.
Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.