Tell me about it, spud Of all the things exchanged between the Old and the New Worlds after Columbus’ crossing, the least glamorous is probably the potato. But it may have been among the most important, says the economic historian Nicholas Decker. Before its arrival from North America, Europeans lived largely off grains, but potatoes yielded three times as many calories per acre. “The potato is a wonder food,” Decker writes, “containing almost all the vitamins needed to sustain life… One can live off of — boring though it is — a diet of potatoes alone.” A new study of early modern Europe found that the arrival of the potato led to healthier citizens: French soldiers had their height taken upon enlistment, giving us a reliable dataset. Soldiers from places that adopted the potato were half an inch taller than those who weren’t. The story of potatoes in Ireland is famous and tragic, but they were popular there for a reason: Until the famine, Irish peasants were “noticeably healthier in appearance, and taller than English peasants.” That ship has sailed In 2022, China built 1,794 large, oceangoing ships. South Korea and Japan built more than 1,300 between them. All of Europe together managed just 319. But the US built… five. The greatest industrial nation in history is not building ships, writes Brian Potter in Construction Physics. And unusually for tales of American manufacturing decline, it’s not a story about enormous dominance followed by later years of stagnation: It’s a longstanding problem. “US shipbuilders have struggled to compete in the commercial market since roughly the Civil War.” Back then, the US had world-leading expertise in building wooden ships, and those technologies were still improving. The skills required to build metal steamships were very different and rapidly industrializing Britain had a significant head start, so the US concentrated on sail. By the 1890s the steamship was king, and the US’ industry was outdated: Just 8% of trade was carried on American-built ships. An enormous government-backed construction boom in and between the world wars also never translated into an efficient, profitable industry: US shipyards were mothballed and by 1950, it was once again marginal, allowing other countries to steam ahead. Shine on, you crazy diamond In 1773, in what was presumably a very costly experiment, the French chemist Lavoisier used the sun’s rays to burn diamonds. It was the first step toward discovering that diamond is the same stuff as coal — charbon, in French; carbon. Lavoisier did not live to make the final connections, carelessly being guillotined during the Revolution, but as Javid Lakha notes in Works in Progress, in the 1950s the obvious next step was taken: Turning cheap, readily available coal into rare, precious diamond, through the careful application of incredible heat and pressure. The first synthetic diamonds were barely dust: Useless for jewelry, but not for industry, where they were employed in grinding tools and saws. Over time techniques improved and they became larger and purer: Now, they can be purer than any natural diamond and impossible to distinguish with the naked eye, and nearly half of engagement rings use them, up from 19% in 2019. We have yet to exhaust their potential: Diamond is an excellent semiconductor in certain circumstances, and could be used to make transistors that dissipate heat better and thus can be packed more tightly than silicon ones. |