Diggin'

Maybe it's nothing.

Maybe, as one wag on Facebook wrote after I posted this picture on my timeline and wondered whether it was an arrowhead, Stone Age tool or a petrified shark's tooth, "It is a shard of rock that by chance is somewhat triangular shaped and looks like all the things you mentioned."

Maybe I let my imagination run wild. Maybe it's a coincidence. Maybe some kid in my neighborhood spent a day fashioning a triangle out of stone in order to teach himself geometry.

Maybe.

I've long...