212 Timeconsciousness in Very Long Life today who misses the present, as a physicist. It seems simply nothing to worry about. But, interestingly, the present is all that exists for us as humans. The past is gone and the future is not here yet. What we experience appears to be a continuing present, as long as we are conscious – also memories of the past, and anticipations of the future are experienced in the present. The present is always with us. We can say, even, that the present itself is unchanging and only its contents change. In a sense, the present is eternal. As long as you live. What is it then that we have that creates the present in us? We call it timeconsciousness. In the place of an infinitesimal point sweeping along the time line, we have a finite time slider on which we sit, so to speak, that slides along time, carrying us piggyback. The slider is the omnipresent present. In my earlier work of the seventies I showed that a good measure of the duration of the present is about 180 milliseconds.  It is the duration of a syllable, of the minimum time during which a decision cannot be reversed, motor reaction time, and the time for which a slowly moving object is seen as moving, rather than stationary. More recently we have also found that it is the preferred time for a composer’s fastest independent pulse components, at least in Mozart and Beethoven Allegros. But a word is not a substitute for understanding, or should not  be.  We  know  little  about  timeconsciousness.  Through our work in music, we have found evidence for four different clocks and processes involved in different aspects of timecon- sciousness in our brain. These clocks involved in music operate in our timeconsciousness. Since it is possible to think music while dreaming, they are transferred also to our changed time- consciousness  while  dreaming  –  some  of  them.  Somehow, in dreaming our timeconsciousness is rescaled – how come? We don’t know.