natural history

Short definition from Wiktionary

Noun

1. 1
   The study of all living things, especially their origins, evolution and interrelationships.
2. 2
   The study of all natural phenomena: botany, zoology, mineralogy, etc.
3. 3
   A treatise or similar work that summarizes the known facts of either of the above.
4. 4
   The progression of a medical condition in an individual.