About my lack of sleep.
It seems that genetic code determines how much time a person needs to sleep. But recently, a strange event happened. Until six months before, I didn't have a clear mind without my eight hours of sleep, but lately, I've noticed that three or four hours were enough and that I didn't want to sleep for eight hours anymore even though I knew it was bad for my health. What caused this transformation? My change of diet? My pillow? This is a complete mystery.