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.

Twenty-two-year-old critic Richard Goldstein savaged the Beatles’ Sgt. Pepper’s Lonely Hearts Club Band in a New York Times review when the album was released in 1967, calling it “busy, hip, and cluttered.” He later admitted the stereo he’d heard it on had a busted left speaker, but he remained unapologetic: “What can I say? If you’re not embarrassed by your youth, what good are you?”

In an 1899 treatise written while in exile, Vladimir Lenin critiqued the capitalist growth of Russian industries in which factory workers had replaced skilled craftsmen. Among his concerns was a shift toward the mass production of cheap accordions, which, he complained, “have nearly everywhere displaced the primitive string folk instrument, the balalaika.”

Hoping to encourage hostages held by FARC during Colombia’s civil war, state negotiators commissioned a local producer in 2010 to create a pop song embedded with a Morse-code message and had it broadcast repeatedly on the radio in rebel-controlled areas. After the lyrics “Listen to this message, brother,” the code sounded as a synth interlude: “Nineteen people rescued. You are next. Don’t lose hope.”