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try. So the concept of invariance has been shattered and that of irre- versibility affirmed. I explain this dissymmetry by something I call missing time (next figures). Does this mean that our senses do not fool us? I am not so sure! Actually, the annoying drawback of fundamental microscopic equa- tions is that they are reversible! Similarly to Newtonian dynamics, the movement towards the future equals the movement towards the past. Neither one is less physical than the other. On the other hand, macro- scopic equations that describe the more universal behavior of the mat- ter on a scale close to ours are irreversible! Assuming that microscopic equations describe macroscopic equations more accurately, why would one be reversible and the other irreversible? “Are we still in the same world?” asks the professor. Ludwig Boltzmann used the laws of statistics to link the dynamics of Newton (reversible law) to the second principle of thermodynamics (irreversible law). This means we no longer have perfectly defined and deterministic trajectories, but position probabilities. The positions and velocity of the molecules can be expressed as mathematical values. Irreversibility would thus be the result of an evolution from a highly unlikely micro-state towards a more probable macro-state. This brings us to the very frontier between determinist and indeterminist causal- ity. Klein concluded that: “The thermodynamic arrow of time only goes from order to chaos.” But this chaos does not exist as such. It is a simple ewe at .Y eat interpretation, an intellectual viewpoint. In reality the entropy meas- ures only the misrecognition of all microscopic states rather than the disorder, which is a squandered thought. Nevertheless, it is remarkable to observe that irreversibility is produced by a lack of recognition! In other words, freedom of reversibility would be an attribute of every sys- tem (or creature) that has perfect knowledge of a state, but also of a choice! Perhaps that is because the creature is the state, or, rather, con- sciousness is the state. All knowledge implies we can choose to apply it. The attentive reader will thus realize that every experience is chosen at some point in time (“temporal portals’), at which our habitual causality does not yet exist! Would not the role of statistics be related to a more or less focused expression of the frontier that exists between determinism and inde- terminism? Between strict causality and absolute freedom? Probabil- ity amplitude would thus be a simple degree of freedom, of choice. It is tempting to suggest that temporal irreversibility is the nature of 122 The Science of Extraterrestrials: UFOs Explained at Last * Eric Julien consciousness in one or more states? Are not statistics the mathematic