Professor of biochemistry, now retired. Lives in California, USA. 

Piotr says: 

I took my first photograph when I was six years old. Many cameras and even more decades later, I am still doing it. Some claim that a photograph faithfully reflects reality. To me, this is not true. The choice of when and where to take a picture, out of a near infinite set of space-time possibilities, reflects the interests, character, but also the momentary state of mind of the photographer. If transported to the same general location, each of you would select a different point of view, or Cartier-Bresson's "decisive moment", to press the shutter release, and would thus end up with a very different image. Therefore, what I am presenting to you is my entirely subjective vision of the world.