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TopicHow did cavemen and shit see without glasses?
DawkinsNumber4
09/12/17 2:53:54 PM
#6:


https://www.livescience.com/27850-social-brain-beat-neanderthal-vision.html

"Neanderthals had a characteristic "bun head" shaped skull which allowed for expanded visual processing in the back of the brain. That left them less head space for the frontal lobe, which governs social cognition."

""We have a social brain, whereas Neanderthals appear to have a visual brain," said Clive Gamble, an archaeologist at the University of Southampton, who was not involved in the study."

"As a result, the extinct hominids had smaller social and trading networks to rely on when conditions got tough. That may have caused Neanderthals to die off around 35,000 years ago."

"To help solve the riddle, Dunbar and his colleagues looked at 13 Neanderthal skull fossils dating from 25,000 to 75,000 years ago and compared them with 32 anatomically modern human skeletons. The researchers noticed that some of the Neanderthal fossils had much larger eye sockets, and thus eyes, than do modern humans. [10 Odd Facts About the Brain]

Low lighting

The team concluded that Neanderthals used their oversized eyes to survive in the lower-light levels in Europe, where the northern latitude means fewer of the sun's rays hit the Earth. (Modern humans also tend to have slightly bigger eyes and visual systems at higher latitudes than those living in lower latitudes, where light levels are higher.) The researchers hypothesized that Neanderthals must, therefore, also have had large brain regions devoted to visual processing."

"Anatomically modern humans, meanwhile, evolved in Africa, where the bright light required no extra visual processing, leaving humans free to evolve larger frontal lobes.

By calculating how much brain space was needed for other tasks, the team concluded that Neanderthals had relatively less space for the frontal lobe, a brain region that controls social thinking and cultural transmission."


I wonder if our vision issues has anything to do with traits from interbreeding between homo sapiens and the other living hominid at the time?
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