astrobiologist
autotroph
banded iron formation
biogeochemical cycle
biosphere
Cambrian explosion
chemoautotroph
chemofossil
cyanobacteria
ecosystem
evolution
evolutionary radiation
extremophile
gene
geobiology
habitable zone
heterotroph
metabolism
microbial mat
microfossil
microorganism
natural selection
photosynthesis
red bed
respiration
stromatolite