I was thinking of neutrinos and their relatives I suppose. It seems to me that these guys keep me in pretty good shape. I like feeling solid, sometimes I dont! For instance when I do cleaning sometimes I can see and feel the dust or grime I am cleaning off something being absorbed into me. Don't ask me to try to explain it it's just something I see and feel happening. It doesn't happen all the time either, so I wonder if it's when we are being buffeted by different sorts of solar wind, and lot's of neutrinos that are altering my perception.
It's like sometimes things aren't solid, or I can see through one object and see another behind it. Bizarre!
It's as though sound, bright, colour, touch all become amplified or diminished depending on how much, and what kind of light is available. I don't much like artificial light as it has wird properties and I seem to get 'sick' if I spend too long in artificial light. Halogen lighting really makes me feel ill, I suppose it's modern 'kryptonite' version of superman's weakness! I wonder if this affects all of us to a greater or lesser degree, just that most people are not aware of it.
I think lighting may have a real effect on who we are. We may be a quite different literally in one sort of light to another!