The work shows overviews, facts and hidden knowledge regarding the following topics:- The physical structure of human beings (the systems and apparatus, physiology of human body, the cell);- Types of beings living on planet Earth (an original classification of beings living on Terra);- Comparing physical characteristics of different beings (apes, humans, humanoid ETs, reptoid ETs, Grey ETs and Praying Mantis);- The alien chromosome (designed by a group of aliens for different enhancements and corrections on humans).The book offers a reach database of resources: books, audio interviews, video interviews, blogs, articles etc.This is a must have knowledge for all beings wondering "Who is who on planet Earth?"