The half-mile Line of Questions interpretive walk was designed to extend the 2009 Summer Sessions of the International Space University and Singularity University to the NASA Ames Research Park's campus.

Questions and thoughtful images were posted weekly on signboards composed of simulated, large-scale circuit board components along a campus walk frequented by the ISU participants. Signboard topics ranged from cosmology to the building blocks of matter, and from space exploration to understanding life on earth. Each challenged participants to think outside the classroom and transformed the entire campus into a learning environment.