Tipping Point - A Visualization. 
This classic graph shows a Tipping Point in action. It shows the adoption by farmers of a new seed.
The top line is a geometric curve. The lower line is a Bell curve. When about 5-10% adopt ( the Bell) the take off threshold is reached and the system "Tips" [Robert Paterson's Radio Weblog]
This is one of those "OhMiGod" moments because this is something I worked with every day. The graph is what a saturation binding curve looks like. If you are looking at the binding of a protein to its receptor, you start by adding small amounts of the protein to a solution containing the receptor. At low protein levels, there is no binding. Then, as you add more, you will reach a point were binding rapidly takes place. Then it levels off again when you reach saturation.. The point at which you reach 50% binding is a very good measure of the affinity of the ligand for the receptor. In this case, it should tell you how 'fast' this tipping point was. Looks like it is about 9 years. 10:18:41 PM 
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