What will alien life look like when humanity discovers it? Scientists Trefil and Summers (professors of physics and astronomy) invite readers to take an imaginary journey through distant worlds and exoplanets. The authors use the latest scientific evidence to build hypotheses about how, where, and what types of life might have evolved. They describe planets of various types - with ultra-low temperatures, water and with increased gravity, consider the possibility of the emergence of life, the probable places of its origin and the path of evolution. At the end of each section you will get acquainted with the humorous arguments of the authors, in proof or refutation of how and why a certain type of life may become the only possible one in the entire Universe. And, what is most interesting: reality may turn out to be much stranger than fiction... The publishing layout of the book is saved in PDF A4 format.