DrMJoyner

Ed, I have been thinking about this for about 30 yrs and in that time the record has fallen 4-5 minute. Our statistical estimates say sometime in the 2030s. Could happen faster with a fast field, incentive based prize money, the right course and good cool temps.

Yes, there is evidence that there are neurochemical changes in the brain that give people a "high'. Most recently so-called endo-cannabanoids have been implicated.

The current trend is for younger, could be due to the financial incentives and not the physiology. Historically older was better

His 26:45 10k PR suggests that 2:03-05 is physiologically possible

Agree with Ed that he was unique talent and could have been the first. His fast time on a hot day in Beijing was amazing