In 1967 Bobby and Ethel Kennedy participated in the tenth annual Hudson River Whitewater Derby. Bobby’s kayak capsized in the freezing water; he was hurtled down the rapids. The next day Ethel attempted the course, accompanied by a ski expert and a mountain guide; the trio’s canoe tipped over three times. “A rescue party’s been sent up the river to get Mrs. Kennedy, who is on a rock,” an announcer told those waiting at the finish. “She’s having a bad day.”

Egyptian pop singer Sherine Abdel-Wahab was sentenced to six months in prison in 2018 for insulting the Nile. Asked by a fan to perform her hit song “Have You Drunk from the Nile?,” Abdel-Wahab responded, “You are better off drinking Evian,” informing the fan that the waters of the Nile can lead to schistosomiasis, a disease also known as snail fever, which has plagued Egypt for so long that strains have been found in excavated pharaonic-era mummies.

Thirteenth-century Japanese Buddhist Mugai Nyodai, the world’s first Zen abbess, struggled to achieve enlightenment until, one night during her training, the bottom fell out of an old bamboo-bound pail she was using to carry water. The spill freed her. “No more water in the pail!” she wrote in a poem commemorating the experience. “No more moon in the water!”

To clear his head during his martial-arts training in the 1950s, Bruce Lee went sailing. He slapped the water angrily and found it instructive about kung fu. “I struck it but it did not suffer hurt,” he later wrote. “I then tried to grasp a handful of it but this proved impossible.” Lee was energized. “That was it!” he recalled. “I wanted to be like the nature of water.”

Many medical experts disdain the widely circulated idea that adults need to drink eight glasses of water per day; most agree that solid foods alone provide enough hydration. Barbara Rolls, a nutrition researcher at Pennsylvania State University, was asked in 2001 about the origin of the spurious rule. “I can’t even tell you,” she said, “and I’ve written a book on water.”