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 When were dental fillings first used?

Answer A Chinese medical reference in 700 A.D. is the first recorded use of silver dental fillings. A German dentistry book dated 1528 to 1530 A.D. describes the use of gold fillings. Modern fillings were... Read More »
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Can zirconium oxide be used for dental fillings?

Zirconium oxide, also known as zirconia, is a ceramic material. According to a 2010 report in the "New York State Dental Journal," it can be used in dental fillings. Zirconia is less likely than ot... Read More »
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When were tanks first used in WWI?

According to FirstWorldWar.com, tanks were first used in World War I on Sept. 15, 1916, when Capt. H.W. Mortimore took British D1 tanks into battle at Delville Wood. These early tanks proved unreli... Read More »
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When were bar codes first used?

In 1948, Bernard Silver, a graduate student at Drexel Institute of Technology in Philadelphia made the first step in the use of bar codes. Silver and Norman Joseph Woodland, a twenty-seven-year-old... Read More »
http://www.answerbag.com/q_view/1908397

How old were you when you first used a computer?

About 35. I had always used typewriters up until then.
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