Psychologists at the University of California recognized a lack of sleep “as a social repellent” and its effect contagious: “People who come in contact with a sleep-deprived individual, even through a brief one-minute interaction, feel lonelier themselves as a result.”
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As a result of technological advances and shortages of enslaved workers, water power became used more widely in the Roman Empire around the late third century; the earliest known depiction of a water-powered stone sawmill was produced around this time in Hierapolis. Later, in 371, the poet Ausonius wrote an ode to the Moselle River: “He turns his millstones in furious revolutions and drives the shrieking saws through smooth blocks of marble.”
Seventh-century Persian king Khosrow II is said to have tested the loyalty of courtiers whom he believed were becoming too close. Telling one of his decision to execute the other, he would swear the man to secrecy and then watch the friend’s behavior. If it went unchanged, he knew the first man was loyal and had kept silent; if different, he was a traitor and dealt with accordingly.
A French tale from 1615 contains a rare early modern mention of a married woman considering birth control. Her method: pressing a bead of perfume on “that artery that the vulgar calls the pulse” during intercourse. The procedure fails—not due to its own inadequacies, the reader is told, but because the woman, so taken by her activity, neglects to apply the perfume.
Carl Jung attributed his split with his mentor Sigmund Freud around 1910 in part to a generational divide. “Our descendants are our most dangerous enemies,” Jung argued, “for they will outlive us, and, therefore, without fail, will take the power from our enfeebled hands.”
Franklin Delano Roosevelt, who gave thirty so-called fireside chats over twelve years, was afraid of fire and refused to lock his door while sleeping so as to ensure easy escape, which he would often practice by dropping quickly from his bed or chair and crawling to the exit.
A Gettysburg resident, F. W. Biesecker, won the contract in 1863 to bury the Union dead, at the rate of $1.59 per corpse, in the town’s recently dedicated national cemetery. After the war, between 1865 and 1870, there were large-scale efforts to rebury all Union soldiers in national cemeteries; to separate them from Confederate corpses, workers assessed jacket color, shoe make, and cotton-underwear quality.
An estimated one in ten Europeans is conceived in an Ikea bed.
Observing Mars through his telescope in 1877, Milanese astronomer Giovanni Schiaparelli saw oceans and canali, meaning channels. The latter was mistranslated into English as canals, implying Martian-made waterways, and an amateur astronomer named Percival Lowell soon began publishing books pointing to these as evidence of life on Mars. By 1910 photographic technology had advanced sufficiently to debunk his extrapolated theories.
In 1891 Erik Weisz began using the stage name Harry Houdini—the first name deriving from his nickname “Ehrie” and the surname from the great French magician Jean-Eugène Robert-Houdin, who himself had taken the surname from his wife, Josephe Cecile Eglantine Houdin, in order, he wrote, “to distinguish me from my numerous homonyms.”
Lorenzo de’ Medici once observed a young sculptor complete the head of an old and wrinkled faun whose mouth he had rendered open. While astonished at the craftsmanship, Lorenzo pointed out that old men never have all their teeth. Once the great patron of the arts had left, the artist knocked out one of the teeth; when Lorenzo returned and saw the statue again, he was so taken with the new version that he decided to adopt the artist, whose name was Michelangelo.
In 1927 Russian psychologist Bluma Zeigarnik identified a phenomenon that came to be known as the Zeigarnik effect, which states that waiters are good at remembering particulars of a restaurant bill—until the bill is paid. “Unfinished tasks are remembered approximately twice as well as completed ones,” concluded Zeigarnik.
“Man is the only being that knows death; all others become old, but with a consciousness wholly limited to the moment which must seem to them eternal. We are time,” writes Oswald Spengler in The Decline of the West.
Chinese Taoist philosophers Zhuangzi and Hui Shi took a walk on a bridge over the Hao River in the fourth century bc. “The minnows swim about so freely,” said Zhuangzi; “such is the happiness of fish.” Hui Shi responded, “You are not a fish, so whence do you know the happiness of fish?” “You are not I,” Zhuangzi replied, “so whence do you know I don’t know the happiness of fish?”
In 2012, twelve zoos in the U.S. and Canada introduced iPads for use during the enrichment times allotted to orangutans as part of a program called Apps for Apes. Richard Zimmerman, director of Orangutan Outreach, said of the animals in the program, “We’re finding that, similar to people, they like touching the tablet, watching short videos of David Attenborough, for instance, and looking at other animals and orangutans.”