We're looking at Earth science, observing our planet. Also space science, looking at the ozone in the atmosphere around our Earth. Also looking at life science. And on a human level, using ourselves as test subjects.

This quote refers to the different aspects of science that can be studied by observing our planet and our own species. Earth science is the study of the Earth and its geology, atmosphere, and oceans. Space science is the study of the solar system and beyond, specifically the ozone layer surrounding the Earth. Life science is the study of living organisms, such as plants, animals, and humans. Lastly, humans can be used as test subjects to gain insight into how the body works, and how it is affected by its environment.