Changes in DNA are caused by lots of things: stress, chemicals, natural phenomena, radiation, diseases, and many other things. But these are usually confined to individuals who are already living. My question, "Was there a significant human DNA mutation near the Christ event site in century -50BC to +50AD?" is a probe of that 100 years at a specific geography and time. I could also ask was there a significant change in DNA at the time and location of Einstein's birth, or Mozart's birth. So, is some natural, chemical, or social phenomena causing these brains to be born.
My hypothesis is that these types of exceptional brains are biologically generated as a result of conditions, specifically social stress, experienced by small populations of humans over a relatively short period of time in a given location. Maybe you have read of the 'guess the number of jelly beans in the jar,' where <50 people asked get the right answer averaged as a group within a few percent of the actual number - every time. I think there might be enough evidence to support or not the furtherance of the hypothesis. That would make them the result of a probabilistic behavior of a group of similar organisms under stressful conditions. Could be something other than stress, but what does the DNA record reflect?
<snicker>That seems to be what corporations are doing. They tried squeezing blood out of the turnip, but that didn't work. Now, they grind us down with stress - hoping that an exception pops that will lay the golden egg.</snicker>