Did we have exercise enthusiasts thousands of years ago? I thought exercise was a characteristic of the more leisure lifestyles of the industrial age and later.


This article gives new meaning to "Use your Noggin." Interesting that this neurogenesis can deplete stems cells if pushed artificially.

The questions they did not answer are these.
How do we compare the brain cells of mice that have a life span of 1000 days with the brain cells of humans who have a life span of 20,000 to 30,000 days?
Is there a limit to the amount of neurogenesis that can take place over a lifetime ?
Why do most researchers suggest the brain hits a limit on maturing and repair by 25 years old and starts a slow decline after that age?
Do mouse neurons have the same vast number of axons per cell (up to 10,000) that are needed for the complex and higher functioning of the human brain cells?

As similar as the human and mouse brain cells may be, there is still a vast difference in the intellectual capacity.