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| NEWSLETTER - JULY 21 |
| Before you look at today's web page, see if you can answer some of these questions about the events that happened on July 21. Some of the names are very familiar. Others will likely stump you. Tickle your curiosity with these questions, then check your answers on today's web page. |
| Quotations for Today |
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| QUIZ |
| Births |
| Rudolph A. Marcus, born 21 Jul 1923, is a Canadian-born American chemist, who won the 1992 Nobel Prize for Chemistry for his theory concerning chemical reactions. The Marcus theory describes, and makes predictions concerning, such widely differing phenomena as the fixation of light energy by green plants (photosynthesis), cell metabolism, photochemical production of fuel, chemiluminescence ("cold light"), the conductivity of electrically conducting polymers, corrosion, the methodology of electrochemical synthesis and analysis, and more. What does his theory describe to explain such reactions? |
| Swedish chemist, Georg Brandt was born on 21 Jul 1694. He was the first person to discover a metal unknown in ancient times which he isolated as a new element in 1730. This element is used to make glass blue, is added to steel to make it harder and have a higher melting point, and traces of it are found in meat and dairy products as vitamin B-12. What is the element he discovered? |
| Deaths |
| A certain astronaut passed into history upon his death on 21 Jul 1998. was America's first man in space and one of only 12 humans who walked on the Moon. He became the first American into space on 5 May 1961, riding a Redstone rocket on a 15-minute suborbital flight that took him and his Freedom 7 Mercury capsule 115 miles in altitude and 302 miles downrange from Cape Canaveral, FL. Can you name this astronaut? |
| Events |
| On 21 Jul 1904, after 13 years of work, the longest railway in the world was completed, with a length of 4,607-miles. Which railway is this? |
| On 21 Jul 2000, the first direct evidence for the third kind of neutrino known to particle physicists was announced. First generation electron neutrinos were created in 1956, and second generation muon neutrinos in 1962. What is the name of the third kind of neutrino? |
| Answers |
| When you have your answers ready to all the questions above, you'll find all the information to check them, and more, on the July 21 web page of Today in Science History. Or, try this link first for just the brief answers. |
| Fast answers for the previous newsletter for July 20: first optical fiber with optical losses low enough for wide use in telecommunications; dinosaur; Guglielmo Marconi; Viking I Lander; the decade including the year1969; Sea of Tranquility. |
| Feedback |
| If you enjoy this newsletter, the website, or wish to offer encouragement or ideas, please write. |
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