The book “The Gospel of LUCA” talks about the animal world and the human race. Only LUCA (Last Universal Common Ancestor) is not an apostle, but our common ancestor, and in order to figure out what kind of creature this is, the reader, together with the author of the book, biologist Maxim Vinarsky, will travel a path of more than 4 billion years. He will get acquainted with history the emergence and evolution of multicellular animals. He will find out that we humans are just one of many branches of the great Tree of Life, and the species Homo sapiens was formed in accordance with the laws common to the evolution of all living things. Will understand how biologists identify family ties between animals and restore the paths of their evolution. Learn about the life and scientific discoveries of scientists - those who came up with the idea of the evolutionary relationship of all organisms on Earth and guessed how this relationship can be determined.