[MD] Animals and Dynamic Quality (Recast)

[Krimel]

> [Platt]
> Incidentally, what do you think is "driving evolution?"
> 
> [Krimel]
> Change

[Platt]
And driving evolutionary change such as "an expansion of perception, an
increase in awareness and enhanced ability to integrate information into
knowledge" (to quote one of my favorite correspondents) is . . .?   

[Krimel]
There are a host of factors involved but if by that you mean the ultimate
source; that single thing without which change here would all but stop.

I'd say sunlight.