Quantum Developments

My colleague David Robertson gave a fascinating talk today in which he used Shakespeare's song “Full Fathom Five” in connection with photography:

Full fathom five thy father lies;
Of his bones are coral made;
Those are pearls that were his eyes;
Nothing of him that doth fade,
But doth suffer a sea-change
Into something rich and strange.

It made me realize that the song could be all about how photographs develop, in little pools of chemical solutions...

So photographs contain information about the environments in which they were developed.