It is no coincidence that we singled out the story of pets in a separate volume, although it would be logical to attribute it to the "Biology" volume. But we felt that animals tamed by man deserve a separate story and a separate book. Scientists believe that the first animal that began to live next to a person was a dog, and this happened 13 thousand years ago. 130 centuries, almost an eternity, friendship between people and animals lasts, and history knows thousands of stories about how animals saved human lives, eased suffering, brought joy, saved from loneliness...