It's impossible to definitively say how many "types" of science there are, as the field is constantly evolving and new sub-disciplines are always emerging. However, we can broadly categorize science into three main branches:

1. Natural Sciences: This branch deals with the study of the natural world, including:

* Physical Sciences: Physics, Chemistry, Astronomy, Geology, Meteorology

* Biological Sciences: Biology, Zoology, Botany, Ecology, Microbiology

* Earth Sciences: Geology, Oceanography, Meteorology, Geography

2. Social Sciences: This branch focuses on human behavior and societies:

* Psychology: Study of the mind and behavior

* Sociology: Study of human societies and social phenomena

* Anthropology: Study of human cultures and societies

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

* Political Science: Study of political systems and government

* History: Study of past events and their impact on the present

3. Formal Sciences: This branch deals with abstract systems and their structures:

* Mathematics: Study of numbers, quantities, and their relationships

* Logic: Study of valid reasoning and argumentation

* Computer Science: Study of algorithms, computation, and information processing

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

Within these main branches, there are countless sub-disciplines and specializations. For example, within biology, you have fields like genetics, molecular biology, evolutionary biology, and many more.

It's important to note that these categories aren't always rigid and there can be overlap between them. For instance, biophysics combines aspects of biology and physics.

Therefore, while we can broadly categorize science into these three main branches, the specific number of "types" is constantly evolving and expanding with new research and discoveries.