Researchers found that 77 percent of Wikipedia articles are written by 1 percent of Wikipedia editors, and they think this is probably for the best.

When Wikipedia was launched in 2001 by Jimmy Wales, an entrepreneur who cut his teeth linking to internet porn in the 90s, its stated objective was to "compile the sum of all human knowledge" and make it freely available to the world. Sixteen years later, the free encyclopedia and fifth most popular website in the world is well on its way to this goal.