Columbia subject headings:
Adaptation (Biology)
Curiosities and wonders.
Ecology.
Extreme environments.
Life (Biology)
Life on other planets.
Organisms.
Harvard subject headings:
Adaptation (Biology)
Biodiversity
Curiosities and wonders
Ecology
Extreme environments
Extreme environments--Microbiology
Life (Biology)
Life on other planets
Organisms
Space environment.
Princeton subject headings:
Adaptation (Biology)
Curiosities and wonders.
Ecology.
Extreme environments.
Life (Biology)
Life on other planets.
Organisms.