I very highly recommend reading up on Dr. John Lilly, easily one of the most interesting scientists during that era. Along with interspecies communication, he heavily researched psychedelic drug experiences and combining them with sensory deprivation tanks. He became heavily addicted to ketamine (reports say that he would come to work every day with a spray bottle full of ketamine, and noisily snort it throughout the day), and eventually became convinced of the existence of a cosmic organization called the Earth Coincidence Control Office (E.C.C.O.), which directed the actions of individuals on Earth. His story is also the inspiration for the video game Ecco the Dolphin.