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Author Question: Bell Telephone Laboratories invented the ________, which replaced the vacuum tube. (Read 238 times) |
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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."