[MD] From each... to each

[craigerb at comcast.net]

> [Arlo previously] 
> How do biologists tell us? Better yet, WHY do biologists tell us [wolves have 
> sharp teeth]? 
> 
> [Craig] 
> That's their job. But you knew that. 
> 
> [Arlo] 
> Why does that job exist? 

Professional biologists exist because their work is valued by others.  Amature biologists exist because their work is valued by themselves.  (Dare I add that you also knew that?)
Craig 
Craig