In 2014 Amelia Hamrick, an undergraduate at Oklahoma Christian University, noticed musical notes written across the buttocks of one of the denizens of hell depicted in Hieronymus Bosch’s painting The Garden of Earthly Delights. She transcribed it into modern notation and made a recording she posted on her blog. “So yes,” she wrote, “this is literally the 600-year-old butt song from hell.” The post went viral.

In 2009 a twenty-four-year-old policewoman in Long Branch, New Jersey, responded to complaints about an “eccentric-looking old man” peering into a house. She asked the man his name. “I’m Bob Dylan,” he said. “I’m on tour.” Taking him for a liar, she put him in the back of her car and drove him to his hotel, where others confirmed he really was the musician. “I think he named a couple of songs,” she later recalled. “But I wouldn’t have known any of the songs.”

Humpback whales, which have a sonic range of at least seven octaves, create songs between the length of a modern ballad and a symphony movement, possibly because their attention span is similar to that of humans. Their tunes also contain repeated refrains that form melodic rhymes, suggesting that, like humans, they use these as mnemonic devices.

Michel de Montaigne’s father believed “it disorders the tender brains of children to awake them by surprise in the morning, and suddenly and violently to snatch them from sleep”; he preferred to rouse his son from slumber “by the sound of some instrument of music,” likely an early form of harpsichord called an epinette. Montaigne recalled later that he “was never without a musician for that purpose.”