The Block Universe idea, representing spacetime as a fixed whole, suggests the flow of time is an illusion: the entire universe just is, with no special meaning attached to the present time. This paper points out that this view, in essence represented by usual space time diagrams, is based on time- reversible microphysical laws, which fail to capture essential features BlockUniverse #SpaceTime #ReGiuSonYoutube #FutureHasBeenWritten #TimeParadox https://youtu.be/nI_CiLpAxSw