Our brains also filters lots of uninterested stuff automatically. When we’re young, many things are interesting. We spend lots of time processing them and it f

Our brains also filters lots of uninterested stuff automatically. When we’re young, many things are interesting. We spend lots of time processing them and it feels like time goes slowly as we have to “experience” these things fully. As we grew older, lots of things have been experienced and known. The brains recognize the known patterns and just filter them out. The brains are probably micro sleep all time while idling saving energy, and the time keeping is off.