Science
"At the heart of science is an essential tension between two seemingly contradictory attitudes -- an openness to new ideas, no matter how bizarre or counterintuitive they may be, and the most ruthless skeptical scrutiny of all ideas, old and new. This is how deep truths are winnowed from deep nonsense."
- Carl Sagan
The idea of citizen science is compelling. It serves to both demysitify science itself, but more importantly, to grow the body of scientific knowledge.