Your choice : 23 facts about your life when the choice is yours
Your choice : 23 facts about your life when the choice is yours by Robert Broski
English | 2021 | ISBN: N/A | ASIN: B09D5BMP8K | 371 pages | EPUB | 0.77 Mb
English | 2021 | ISBN: N/A | ASIN: B09D5BMP8K | 371 pages | EPUB | 0.77 Mb
—William Shakespeare, "Hamlet" A long time ago, when I was in junior high school in the United States, I remember that my biology teacher taught me that all the chemicals that make up the human body can be bought at a hardware store for almost $5. I don’t remember the actual amount. It may be US$2.97 or US$13.5. Anyway, even in the 1960s, it was a small amount of money. I still remember that I was taken aback at the time: How can I make a lazy guy like me with only a few dollars?
This incident is so embarrassing that I have been unforgettable for so many years. The question is: is this true? Are we really worth so little money?
Many authorities (you may interpret the "authority" here as "an undergraduate of science who has no one to date on Friday") have tried many times (mainly for fun) to calculate how much material it takes to build a personal fee. Perhaps the most respectable and comprehensive attempt in recent years came from the Royal Society of Chemistry. At the Cambridge Science Festival in 2013, it calculated how much it would cost to build all the elements necessary for the actor Benedict Cumberbatch. (That year, Cumberbatch was the guest director of the Science Festival, and he was using it, and he was a human with a typical physique.)
In general, according to the calculations of the Royal Society of Chemistry
, 59 elements are needed to
construct a person. Six of them-carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus-account for 99.1% of our body, and most of the remaining elements are somewhat unexpected. Without molybdenum in the body, or vanadium, manganese, tin, and copper, who would have thought that we would be incomplete? It must be said that our human demand for some elements is actually very small, and can only be measured in parts per million, or even parts per billion. For example, for every
999,999,999 and 1/2 of all other atoms in the body, there are only 20 cobalt atoms and 30 chromium
atoms.
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