The main idea is that primates such as humans and chimps lost the ability to synthesize vitamin C eons ago, and as a result evolved excellent color vision for finding fruits and in some cases hunting other animals. Pauling supplemented his diet assiduously with Vitamin C and lived to be 93 years old.
Watson has now beaten this record. Maybe it was the Vitamin C, but maybe it was the casual racism and objectivation of female coworkers and subordinates... Who knows?