"Every year Edge.org poses an Annual Question to dozens of scholars, scientists, writers, artists and thinkers. The respondents this year include the reasonably famous, such as Arianna Huffington, Steven Pinker, Brian Eno, Daniel Dennet, Sam Harris and 13.7's own Stuart Kauffman, as well as the not so famous (like me).
"The 2013 question is: "What should we be worried about?" Respondents were urged to raise worries that aren't already on the public radar, or to dispel those that are" (Lombardo, NPR)
The above figure is the landscape of ~40,000 student submissions to the same programming assignment on Coursera's Machine Learning course. Nodes represent submissions and edges are drawn between syntactically similar submissions. Colors correspond to performance on a battery of unit tests (with red submissions passing all unit tests). In particular, clusters of similarly colored nodes correspond to multiple similar implementations that behaved in the same way (under unit tests).