Here is a comprehensive list of natural sciences and their sub-disciplines:
### **1. Physics**
- **Classical Mechanics**
- Statics
- Dynamics
- Kinematics
- Fluid Mechanics
- Continuum Mechanics
- Acoustics
- **Thermodynamics**
- **Electromagnetism**
- **Optics**
- Physical Optics
- Geometrical Optics
- Quantum Optics
- **Quantum Mechanics**
- Quantum Field Theory
- Quantum Electrodynamics
- Quantum Chromodynamics
- **Relativity**
- Special Relativity
- General Relativity
- **Statistical Mechanics**
- **Condensed Matter Physics**
- Solid-State Physics
- Superconductivity
- Semiconductors
- **Particle Physics**
- High-energy Physics
- Nuclear Physics
- **Astrophysics**
- Cosmology
- Planetary Science
- Stellar Astrophysics
- **Plasma Physics**
- **Biophysics**
- **Geophysics**
### **2. Chemistry**
- **Analytical Chemistry**
- **Physical Chemistry**
- Thermochemistry
- Electrochemistry
- Photochemistry
- Quantum Chemistry
- **Organic Chemistry**
- Biochemistry
- Polymer Chemistry
- **Inorganic Chemistry**
- Organometallic Chemistry
- Solid-state Chemistry
- **Theoretical Chemistry**
- **Environmental Chemistry**
- **Medicinal Chemistry**
- **Computational Chemistry**
- **Nuclear Chemistry**
- **Chemical Engineering**
### **3. Astronomy**
- **Astrophysics**
- **Cosmology**
- **Planetary Science**
- **Exoplanetology**
- **Galactic Astronomy**
- **Stellar Astronomy**
- **Radio Astronomy**
- **Infrared Astronomy**
- **Optical Astronomy**
- **Ultraviolet Astronomy**
- **X-ray Astronomy**
- **Gamma-ray Astronomy**
- **Astrobiology**
- **Astrometry**
- **Celestial Mechanics**
### **4. Earth Sciences**
- **Geology**
- Mineralogy
- Petrology
- Geomorphology
- Stratigraphy
- Sedimentology
- Paleontology
- Structural Geology
- Volcanology
- Seismology
- Geochemistry
- Geochronology
- Hydrogeology
- Environmental Geology
- **Meteorology**
- Climatology
- Atmospheric Physics
- Atmospheric Chemistry
- Aeronomy
- Paleoclimatology
- **Oceanography**
- Physical Oceanography
- Chemical Oceanography
- Biological Oceanography
- Geological Oceanography
- Marine Geology
- Marine Biology
- **Soil Science**
- Pedology
- Edaphology
- **Glaciology**
- **Environmental Science**
- Ecology
- Environmental Chemistry
- Environmental Physics
- Environmental Biology
- **Geophysics**
- Seismology
- Volcanology
- Magnetism
- Gravimetry
- Geodesy
- **Hydrology**
- Limnology
- Hydrogeology
### **5. Biology**
- **Botany**
- Plant Physiology
- Plant Ecology
- Plant Taxonomy
- Plant Pathology
- Plant Genetics
- **Zoology**
- Animal Physiology
- Animal Ecology
- Ethology
- Entomology
- Ornithology
- Herpetology
- Mammalogy
- Ichthyology
- **Microbiology**
- Bacteriology
- Virology
- Mycology
- Parasitology
- **Molecular Biology**
- **Cell Biology**
- **Genetics**
- Genomics
- Proteomics
- Epigenetics
- **Biochemistry**
- **Biotechnology**
- **Ecology**
- Population Ecology
- Community Ecology
- Ecosystem Ecology
- **Evolutionary Biology**
- **Developmental Biology**
- **Physiology**
- Neurophysiology
- Endocrinology
- Cardiovascular Physiology
- **Immunology**
- **Neuroscience**
- Cognitive Neuroscience
- Computational Neuroscience
- **Anatomy**
- **Histology**
- **Pharmacology**
- **Biophysics**
- **Biostatistics**
- **Bioinformatics**
- **Biogeography**
- **Paleontology**
- Paleobotany
- Paleozoology
- Micropaleontology
- **Marine Biology**
- **Environmental Biology**
- **Chronobiology**
- **Systems Biology**
- **Astrobiology**
- **Bioremediation**
- **Conservation Biology**
### **6. Environmental Sciences**
- **Environmental Chemistry**
- **Environmental Biology**
- **Environmental Physics**
- **Ecotoxicology**
- **Conservation Ecology**
- **Restoration Ecology**
- **Climate Science**
- **Atmospheric Science**
- **Ocean-Atmosphere Interactions**
- **Earth System Science**
### **7. Interdisciplinary Sciences**
- **Biochemistry**
- **Biophysics**
- **Biogeochemistry**
- **Geochemistry**
- **Geobiology**
- **Astrochemistry**
- **Astrobiology**
- **Materials Science**
- **Nanotechnology**
- **Bioinformatics**
- **Computational Biology**
- **Systems Biology**
- **Environmental Engineering**
- **Biomedical Engineering**
- **Agricultural Sciences**
- Agronomy
- Horticulture
- Animal Science
- Food Science
- **Forestry**
- **Fisheries Science**
- **Veterinary Science**
- **Space Science**
- Space Physics
- Space Biology
- Space Chemistry
- **Marine Science**
- **Cryology**
### **8. Earth and Planetary Sciences**
- **Geodesy**
- **Geomatics**
- **Cartography**
- **Remote Sensing**
- **Geoinformatics**
- **Planetary Geology**
- **Planetary Atmospheres**
- **Exogeology**
- **Planetary Science**
### **9. Atmospheric Sciences**
- **Meteorology**
- **Climatology**
- **Atmospheric Chemistry**
- **Atmospheric Physics**
- **Aeronomy**
- **Paleoclimatology**
- **Space Weather**
### **10. Space Sciences**
- **Astronomy**
- **Astrophysics**
- **Cosmology**
- **Planetary Science**
- **Astrobiology**
- **Heliophysics**
- **Space Weather**
### **11. Additional Disciplines**
- **Hydrology**
- Surface Hydrology
- Groundwater Hydrology
- Ecohydrology
- **Limnology**
- **Oceanography**
- Marine Ecology
- Ocean Engineering
- **Cryosphere Science**
- Glaciology
- Snow Science
- Permafrost Studies
- **Paleontology**
- **Environmental Toxicology**
- **Conservation Science**
- **Biotechnology**
- **Genetic Engineering**
- **Molecular Genetics**
- **Astrogeology**
- **Seismology**
- **Volcanology**
- **Geophysics**
### **12. Applied Sciences**
- **Medical Sciences**
- Human Biology
- Medical Microbiology
- Epidemiology
- **Agricultural Sciences**
- **Environmental Engineering**
- **Biomedical Engineering**
- **Biotechnology**
- **Nanotechnology**
### **13. Mathematical and Computational Sciences**
- **Biostatistics**
- **Computational Biology**
- **Bioinformatics**
- **Astrostatistics**
- **Geostatistics**
### **14. Earth System Sciences**
- **Earth System Science**
- **Climate Science**
- **Biogeochemistry**
- **Geobiology**
### **15. Miscellaneous**
- **Ecology**
- **Ethology**
- **Sociobiology**
- **Chronobiology**
- **Bioclimatology**
- **Paleobiology**
- **Geoarchaeology**
- **Geohazards**
- **Disaster Science**
- **Medical Geology**
- **Astroecology**
This extensive list covers the major branches and sub-disciplines within the natural sciences, encompassing physical sciences, earth sciences, life sciences, and interdisciplinary fields that bridge multiple areas of study.