Quite a number of scientific experiments have been conducted worldwide to prove the existence of the phenomenon and investigate its nature. For example, experiments on three phasers at the Max Plank Institute in Frankfurt (2008) demonstrated the following: the largest difference between the states of wakefulness, the phase, and rapid-eye-movement (REM) sleep is observed at the 40 Hz frequency, and is concentrated in the frontal parts of the brain. Essentially, it was demonstrated that the phase is something in-between wakefulness and REM sleep. Notably, those very parts of the brain that are very much responsible for consciousness and whose development distinguishes humans from primates turn out to be the most active while in the phase. This work was undertaken by J. Allan Hobson, Ursula Voss, Romain Holzmann, and Inka Tuin. They are credited with demonstrating the difference between states of consciousness at 40 Hz. More in-depth explanations of the nature of the phase state phenomenon remain to be discovered. With each passing year, the scientific community increasingly realizes how important the study of this state is, recognizing that it enables a better understanding of the mechanisms responsible for consciousness and how varying states of wakefulness and sleep arise. There is also a theory which states that the phase is a product of the evolution of human consciousness: consciousness first arose in and occupied wakefulness, and then gradually began to seep into the REM state, the next