Psychologically, we inhabit a 'specious present'
Psychological and neurological studies suggest that we do not perceive events moment-by-moment but rather integrate them into perceptual units of approximately 2 to 3 seconds duration. This results in successive events forming a perceptual unity that can be apprehended without recourse to memory.
This discovery bears on the philosophical debate about the 'specious present' - so called because it is a duration rather than an instant of time (see citation below). The evidence cited below indicates that our brains are incapable of perceiving a moment in time - at least in the sense of an infinitesimally short duration - even if such a thing existed.