Because it floats in the spinal fluid, and the physical rule says: Every body is submerged in a liquid that loses its weight as much as the weight of the joker liquid, therefore we do not feel its weight and weight, so the brain weight becomes 50 grams.
One of the most precious prayers movement is that this joker fluid moves up and down when kneeling and kneeling and gives a kind of massage to the brain, and this is one of the reasons for mental comfort after prayer.
Your life is drawn with precision, so (ن نن ّا كل َ شي ْ خل َن َاه ُ ب ِد َر ٍ)
