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“Time moves in one direction, memory in another”*…

 

lennon

A few years ago a student walked into the office of Cesar A. Hidalgo, director of the Collective Learning group at the MIT Media Lab. Hidalgo was listening to music and asked the student if she recognized the song. She wasn’t sure. “Is it Coldplay?” she asked. It was “Imagine” by John Lennon. Hidalgo took it in stride that his student didn’t recognize the song. As he explains in our interview below, he realized the song wasn’t from her generation. What struck Hidalgo, though, was the incident echoed a question that had long intrigued him, which was how music and movies and all the other things that once shone in popular culture faded like evening from public memory.

Hidalgo is among the premier data miners of the world’s collective history. With his MIT colleagues, he developed Pantheon, a dataset that ranks historical figures by popularity from 4000 B.C. to 2010. Aristotle and Plato snag the top spots. Jesus is third…

Last month Hidalgo and colleagues published a Nature paper that put his crafty data-mining talents to work on another question: How do people and products drift out of the cultural picture?…

Hidalgo explains the two ways that people and events drop from our collective memories at “How We’ll Forget John Lennon.”  Explore Pantheon here.

* William Gibson

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As we muse on memory, we might recall that it was on this date in 1885 that LaMarcus Adna Thompson received the first patent for a true “switchback railroad”– or , as we know it, a roller coaster.  Thompson has designed the ride in 1881, and opened it on Coney Island in 1884.  (The “hot dog” had been invented, also at Coney Island, in 1867, so was available to trouble the stomachs of the very first coaster riders.)

Thompson’s original Switchback Railway at Coney Island

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