I'll likely pull this poem down

...shortly, but here it is. For now.

The Photo Lab at Extra Foods

The line-up is long. Extra long faces.
A woman scans photo after photo,
likely grandchildren, great-grandchildren.
Scans a little girl. A girl hugging a dog,
a tractor in the background,
a steel bin, blue sky. Scans
the photographer’s long shadow.
If Darwin were alive and in line
he’d surely nod at the investment,
at the typical machine. The long
line of genes. Twenty-five 5X7s later
the line-up remains. Faces change.
People come and go. Snapshots
slip into an envelope. The origin
glossy side up. Like it matters.

Update:
June 4 - I just received a lovely email with some excellent "tweaky suggestions." Many thanks to the editor! Here's the new, edited version:

The Photo Lab at Extra Foods

The line-up is long. Extra long faces.
A woman scans shot after shot,
grandchildren, their children,
scans a little girl: a girl hugging a dog,
tractor in the background,
steel bin, blue sky. Scans
the photographer's long shadow.
Were Darwin alive and in line
he'd surely nod at the investment,
at the typical machine. The long
line of genes. Twenty-five 5X7s later
the line-up remains. Faces change.
People come and go. Snaps
slip into an envelope. The origin
glossy side up. Like it matters.