Slightly OT: "The Rods... so sensitive that they can be triggered by single photon" This sort of thing is why I love HN. Irrespective of the topic, there is al

Slightly OT: "The Rods... so sensitive that they can be triggered by single photon" This sort of thing is why I love HN. Irrespective of the topic, there is always some little gem I find somewhere. I was very sceptical of this claim, so I looked it up. Turns out it is possible: http://math.ucr.edu/home/baez/physics/Quantum/see_a_photon.html http://math.ucr.edu/home/baez/physics/Quantum/see_a_photon.h... http://www.ncbi.nlm.nih.gov/pubmed/10800676 http://www.ncbi.nlm.nih.gov/pubmed/10800676 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1281447/?page=1 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1281447/?page=1