Biological networks refer to complex systems of interactions between molecules, cells, and organisms within living organisms. These networks can include various types of interactions, such as genetic, biochemical, and physiological interactions that govern cellular functions and organismal behaviors. Research in biological networks aims to understand how these interactions work together to regulate various biological processes, such as cell signaling, gene expression, and disease progression. This field of study often involves the use of computational and systems biology approaches to analyze and model these networks, with the ultimate goal of uncovering key principles underlying biological systems and identifying potential therapeutic targets for various diseases.