"Бытие и время" (Being and Time) is a philosophical work by Martin Heidegger, published in 1927. It explores the nature of existence, focusing on the concept of Dasein, which refers to human beings as entities that are aware of and question their own existence. Heidegger examines how individuals relate to time and being, emphasizing the importance of understanding one's own mortality. The book is divided into two main parts: the analysis of Dasein and the exploration of time. Heidegger argues that our understanding of being is deeply connected to our experiences and the temporal nature of life. This work has significantly influenced existentialism and contemporary philosophy.