The authors - a young biologist and his wife - lived for five years in Tanzania studying elephant life in Manyara National Park. The purpose of their work was to identify the peculiarities of animal breeding under the influence of the "human" factor. The book forces us to reconsider many views on the ethology of elephants. She gives a detailed picture of the nature of Tanzania, draws a variety of portraits of Africans - enthusiasts of studying the fauna of their country. The book contains adventures, losses, and joys of discovery.