old school

[Beth Agnew]

So when I show my students pictures of the cave paintings, and tell them 
it was an early form of technical writing, I'm not far off at all!
--Beth

John Hedtke wrote:
> Actually, that reminds of something from my very early career, when 
> we actually had to evolve hands with fully opposable thumbs to hold 
> the pots of red ochre we used for painting the design documents on 
> the cave walls.  Previously, we'd had to grip things in our teeth and 
> move our heads up and down, which didn't work as well on the fiddly 
> bits of the drawings.
>
> The development of the flatter Cro-Magnon face and more tightly 
> meshing teeth?  That was a design change our team suggested as a side 
> modification to make it easier to chew the sticks we used for brushes.
>