Did you know that your eye is related to the pinhole camera? Light enters through the pupil of the eye, and a tiny image of the outside world fans out across the back of the eye, on the retina.  If you have an extremely dark room that has a window to the outside world, try...

A friend of mine said: "... Concerning self-correction, can we say that the system corrects itself toward a state of homeostasis (feedback----correction----goal) OR toward maintaining the integrity of the closed system? Is it o.k. to look at this in terms of homeostasis?   Reason why I'm asking is that I've been looking at the socialization behavior...

WARNING: PROJECTIVE GEOMETRY MAY PUT HOLES IN YOUR BRAIN.  YOUR MIND MIGHT LEAK OUT - IF YOU WANT YOUR MIND IN YOUR BRAIN STOP READING NOW. Okay, here is a geometric exercise that I find very interesting (for some context about WHY it is interesting, look here). It is, however, more complicated than the previous one...