Recent research shows people living in polar regions has the eyeballs and brains bigger.
Increased brain size and eye allows a person to see better than those who lived on the equator.
"Someone who lives in the polar regions will have the eyeball 20 percent greater than those living in the equator," Head of the Institute of Cognitive & Evolutionary Anthropology at Oxford University, as reported by Robin Dunbar Discovery News page.
"People who live at high latitudes have a higher visual activity of the living around the equator," added Dunbar.
"Essentially, they have a better vision to overcome the lack of lighting levels in areas of high latitudes."
For the study, Dunbar and colleagues, Eiluned Pearce examined 55 individuals from 12 different populations.
This study focused on volume and cranial capacity. Individuals who studied the people living on 200 years ago and the skull into the Oxford University Museum collection.
The study found a significant relationship between latitude with a brain. The lowest brain possessed by many types of Micronesia who live around the equator with a weight of 40.6 ounces of brain.
While larger brains have a lot of kinds of Scandinavia live around the pole with a weight of 50.2 ounces.
Skull citizen residents of North Pole is not included, but the researchers made estimates 20 percent larger based on the data they have.
However, researchers quickly say this is not related to brain volume and intelligence.
"Essentially, we mean people have larger brains in people who live in high latitudes, does not mean they are smarter. It just means they have an increased volume of the brain used for vision and this has increased the size of the brain as a whole," said Pearce .
Larger eyeball allow images to fall into the photoreceptor is smaller so it is more clear to distinguish.
The amount of lighting on the earth decreases with increasing latitude. Thus, people who live in high-latitude areas need to improve eyesight.
Increased brain size and eye allows a person to see better than those who lived on the equator.
"Someone who lives in the polar regions will have the eyeball 20 percent greater than those living in the equator," Head of the Institute of Cognitive & Evolutionary Anthropology at Oxford University, as reported by Robin Dunbar Discovery News page.
"People who live at high latitudes have a higher visual activity of the living around the equator," added Dunbar.
"Essentially, they have a better vision to overcome the lack of lighting levels in areas of high latitudes."
For the study, Dunbar and colleagues, Eiluned Pearce examined 55 individuals from 12 different populations.
This study focused on volume and cranial capacity. Individuals who studied the people living on 200 years ago and the skull into the Oxford University Museum collection.
The study found a significant relationship between latitude with a brain. The lowest brain possessed by many types of Micronesia who live around the equator with a weight of 40.6 ounces of brain.
While larger brains have a lot of kinds of Scandinavia live around the pole with a weight of 50.2 ounces.
Skull citizen residents of North Pole is not included, but the researchers made estimates 20 percent larger based on the data they have.
However, researchers quickly say this is not related to brain volume and intelligence.
"Essentially, we mean people have larger brains in people who live in high latitudes, does not mean they are smarter. It just means they have an increased volume of the brain used for vision and this has increased the size of the brain as a whole," said Pearce .
Larger eyeball allow images to fall into the photoreceptor is smaller so it is more clear to distinguish.
The amount of lighting on the earth decreases with increasing latitude. Thus, people who live in high-latitude areas need to improve eyesight.
Post a Comment