<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">The fraction of fossil olfactory receptor genes is significantly
higher in all species with full color vision. This suggests that
the evolution of trichromatic vision --- which allows these
primates to detect food, mates, and danger with visual cues ---
has reduced their reliance on the sense of smell.
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