Assertion: cyanobacteria | /r/CapableOf | raise oxygen levels
Facets:
value: during the great oxidation event
type: TEMPORAL
value: ago
type: TEMPORAL
value: around 2.45–2.32 billion y
type: TEMPORAL
value: in the atmosphere
type: LOCATION
Source sentences:
text: It has been suggested that cyanobacteria raised oxygen levels in the atmosphere around 2.45–2.32 billion y ago during the Great Oxidation Event (GOE), hence dramatically changing life on the planet.