The scientific study of life is biology. Biology is the branch of science that deals with the study of living organisms and their interactions with the environment. This includes the study of everything from the smallest microorganisms to the largest animals and plants. Biologists use a variety of scientific methods and techniques to study life, including observation, experimentation, and data analysis. Some of the major fields of biology include botany (the study of plants), zoology (the study of animals), and ecology (the study of the interactions between living organisms and their environment).