According to a slightly edited Zooniverse mailing received on oct 9 2014, We Need Us is an artistic visualization of Zooniverse Citizen science activities. It has has been created by artist Julie Freeman. She takes anonymised information from participant's clicks, counting the number of volunteers active, and classifications that they create, every minute. She stores this as sets of values, while also recording the frequency of activity over an hour, a day, and a month. These sets of values create rhythms that are translated into moving shapes, and play different sounds.
See also STEAM-powered computing education, the combination of Art and engineering does seem to have a bright future!