Posts Tagged ‘krypton’
“Counterfactual reasoning, which deals with what-ifs, might strike some readers as unscientific. Indeed, empirical observation can never confirm or refute the answers to such questions.”*..
… still, we ask of our history, our reality “what if?”… The estimable Colin McGinn ponders why…
In a world with less gravity, the birds would be huge. In a world with more gravity, only insects would fly. In a world with more light and plant predators, plants would have consciousness and advanced intelligence. In a world with greater water resistance, whales would be small. In a colder world, there would be no cold-blooded animals. In a hotter world, all animals would be cold-blooded. In a wetter world, we would have gills. In a drier world, life would begin on the land, if it begins at all. In a world without tool-forming materials, we would still be walking on four legs. In a world with only predators, there would be no life. In a world without predators, life would be simple and boring. In a world without a sun, life would be primitive, unless there was another power source. In a world with available nuclear power, life would be much more abundant than now. In a world without consciousness, there would be no war. In a world without emotion, there would be no suicide. In a world with no psychology, there would be no madness. In a world without motion, there world be no progress and no death. In a world without causation, there would be only chaos. In a world without necessity, there would be only randomness. In a world without events, everything would be eternal. In a world without the infinite, there would be no finite. In a world without relations, there would be no facts. In a world without facts, there would be nothing. In a world without reality, there would be no unreality. In a world without nothingness, there would be no being.
Counterfactuals are inherently surprising, which is why we are fascinated by them. They tell us how different things could be under small changes. There are many kinds of counterfactual. We live in their shadow. They are always controversial, sometimes paradoxical. They give us a sense of intellectual freedom. They scare us. They are also funny. We wouldn’t know what to do without them. In a world without counterfactuals, there would be no thought worthy of the name…
On the utility– the necessity– of contemplating the unreal: “Counterfactuals.”
See also: “What is counterfactual thinking and why should you care about it?” (source of the image above)
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As we analyze alternatives, we might recall that it was on this date in 1898 that chemist Morris Travers discovered Krypton– the element (Kr), not the counterfactual planet.
(Not so) Solid Gold…
During World War II, Hitler banned the export of gold from Germany. But gold, valuable in small amounts and not easily traced, is notoriously difficult to regulate. (Indeed, that is likely where much of its value derives.) Hitler’s edict was, frustratingly to him, mostly unenforceable.
One exception? Nobel Prize medals.
Before 1980, the medals given by Sweden (that’s to say, all but the Nobel Peace Prize , which is awarded by Norway) were made of 600 grams of 23-karat gold — thus subject to Hitler’s export ban. And as the recipient’s name was engraved on the back of the medal, its ownership was all-too-clear. This proved particularly perilous for two German physics laureates, Max von Laue (winner, 1914) and James Franck (1925). At the outset of World War II, they had entrusted the Bohr Institute, in Copenhagen, Denmark (the research institution of fellow physics laureate Neils Bohr) with the safe keeping of their medals, assuming that Nazi soldiers would otherwise confiscate their prizes. But when Nazi troops invaded Denmark, they also raided the Institute. Had von Laue’s and Franck’s medals been discovered, the consequences for the learned duo would most likely have been dire.
Enter Hungarian chemist George de Hevesy, a future Nobel Laureate himself (in Chemistry). He, Jewish, had gone to the Institute looking for — and temporarily at least, finding — safe haven from the Nazis. He and Bohr decided that more standard ways of hiding the medals (e.g. burying them) would not suffice, as the risk of harm to von Laue and Franck was too great to chance the medal’s discovery. The chemist de Hevesy took more drastic action. He created a solution of aqua regia — a concoction consisting typically one part nitric acid to three parts hydrochloric acid, which is so named because it can dissolve two of the “royal” metals, gold and platinum. (Wikipedia explains how, for those with a sizable understanding of chemistry.) He then left the gold-bearing aqua regia solution on his laboratory shelf within the Institute, hidden in plain sight as Nazi stormtroopers ransacked the Institute.
The plan worked, and von Laue and Franck were safe — as were their awards. The gold remained safely on that shelf, suspended in aqua regia, for the remainder of the war, unnoticed by the German soldiers. When the war ended, de Hevesy precipitated the gold out of the solution, and the Nobel committee recast the medals.
Bonus fact: Throughout human history (through 2009, at least), mankind has successfully mined roughly 165,000 metric tons of gold. At gold’s density, that comes out to about 300,000 cubic feet — a relatively tiny-sized amount. For comparison’s sake, all the gold ever mined could be contained by the New York Public Library’s Rose Reading Room (seen here), which has a volume of approximately 1.2 million cubic feet.
From the always-illuminating Now I Know.
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As we remark that sometimes even things that don’t shine are gold, we might send elemental birthday greetings to Morris William Travers; he was born on this date in 1872. As the laboratory partner of Sir William Ramsay (who later won a Nobel Prize for the work), Travers participated in the discovery of the “noble gases”– Neon, Xenon… and Krypton.
Bohr model of a Krypton atom
Not, as Wired reminds us, to be confused with the planet Krypton…
When Jerry Siegel and Joe Shuster created Superman in Action Comics No. 1 (published June 1938), they named their superhero’s home planet after the chemical element discovered 40 years earlier. Retellings of Superman’s origins place his arrival on Earth around the time of World War I, a mere 20 years after Ramsay’s and Travers’ discovery of krypton.
Siegel and Shuster may have been inspired by the element’s cryptic name [from the Greek kryptos for hidden], its ghastly glow, or perhaps just its sound– like George Eastman favoring the strength of the letter K.
Travers went on to be the founding director of the Indian Institute of Science in the course of a long and productive career as a chemist in both academe and industry… still he was, from his days with Ramsey, known in scientific circles as “Rare Gas Travers.”
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