In 2008, Jason Polan decided to embark on a project that, when you first hear about it, seems almost impossible.
He's planning to draw every person in New York.
If that sounds overly ambitious, his previous projects have included drawing every piece of art in the Museum of Modern Art and drawing every single kernel in a popped bag of microwave popcorn.
"I have particular favorite spots: the Museum of Modern Art, Taco Bell, the post office," Polan told BuzzFeed. "But I also draw people randomly, on the train, or on a bus, or on a corner."
He sometimes runs into and draws famous people like Jon Stewart, Shepard Fairey and Jerry Seinfeld.
Wondering how long it would take for him to actually finish this project?
In 2009, the New York Times predicted that, if Polan draws one person every five minutes, it would take 79 years to reach his goal.
"I know that it's probably impossible, but I'm willing to work on it forever," Polan told the Times. "Just working on it has a value in itself, so finishing the project is not necessarily the best thing that could come out of it.