Related terms:
microbial mat
debate about whether
anoxia
late devonian
geochemical
cambrian explosion
land plants
extinction event
silurian
carboniferous
devonian
muller
ordovician
paleontology
fossil record
extinction
Wikipedia sources:
Extinction event
Paleontology
Late Devonian extinction
Extinction
Evolutionary history of life
Anoxic event
Nemesis (star)
Modern evolutionary synthesis
Context for words:
mass
extinctions
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