It's impossible to list *all* the branches of science as they are constantly evolving and new fields are emerging all the time. However, here's a breakdown of the major branches of science, including some of their sub-disciplines:

Natural Sciences

* Biology: The study of life.

* Zoology: Study of animals

* Botany: Study of plants

* Microbiology: Study of microorganisms

* Genetics: Study of heredity and variation

* Ecology: Study of relationships between organisms and their environment

* Physiology: Study of how living organisms function

* Anatomy: Study of the structure of living organisms

* Evolutionary Biology: Study of the origin and diversification of life

* Chemistry: The study of matter and its properties.

* Organic Chemistry: Study of carbon-containing compounds

* Inorganic Chemistry: Study of non-carbon-containing compounds

* Analytical Chemistry: Study of the composition and structure of matter

* Physical Chemistry: Study of the physical properties and behavior of matter

* Biochemistry: Study of the chemistry of living organisms

* Physics: The study of the fundamental laws of nature.

* Classical Mechanics: Study of motion and forces

* Electromagnetism: Study of electricity and magnetism

* Thermodynamics: Study of heat and energy

* Optics: Study of light and its properties

* Quantum Mechanics: Study of the behavior of matter at the atomic and subatomic level

* Astrophysics: Study of the physical properties and evolution of celestial objects

* Earth Sciences: The study of the Earth and its systems.

* Geology: Study of the Earth's physical structure and history

* Meteorology: Study of the atmosphere and weather

* Oceanography: Study of the oceans

* Geography: Study of the Earth's surface and its features

* Environmental Science: Study of the interactions between humans and the environment

* Paleontology: Study of fossils and ancient life

Social Sciences

* Psychology: Study of the mind and behavior

* Sociology: Study of society and social behavior

* Anthropology: Study of human cultures and societies

* Economics: Study of the production, distribution, and consumption of goods and services

* Political Science: Study of government and political processes

* History: Study of the past

* Geography: Study of the Earth's surface and its features

Formal Sciences

* Mathematics: Study of numbers, quantities, and structures

* Computer Science: Study of computers and computation

* Logic: Study of reasoning and argumentation

* Statistics: Study of data collection, analysis, and interpretation

Applied Sciences

* Engineering: Application of scientific principles to design and build structures, machines, and systems

* Medicine: Application of scientific knowledge to diagnose, treat, and prevent diseases

* Agriculture: Application of scientific knowledge to improve crop production and animal husbandry

* Technology: Development and application of new tools and techniques

Interdisciplinary Fields

* Biotechnology: Combines biology and technology

* Neuroscience: Combines biology, psychology, and medicine

* Environmental Engineering: Combines engineering and environmental science

* Astrobiology: Combines biology and astronomy

This is not an exhaustive list, but it gives you a good starting point for exploring the vast world of science!