Assertion: human's ancestor | /r/CapableOf | lose one of three cones
Facets:
value: in the retina
type: LOCATION
value: during the mesozoic era
type: TEMPORAL
Source sentences:
text: While the remote vertebrate ancestors of the primates possessed three color vision (trichromaticism), the nocturnal, warm-blooded, mammalian ancestors lost one of three cones in the retina during the Mesozoic era.