Tibetans, Andeans and Ethiopians are three small tribes who live in high elevations and conditions that, for lowlanders, would be considered hazardous and unsafe; but for them, it is an everyday life struggle. Just like those who live in remote, extreme climates, like the Inuits, these tribes have changed their whole genetic make-up in order to survive these conditions peacefully. Communities living in high altitudes and climates could be prime examples of how to survive in the harshest environments of the world.
Humans first evolved in Africa, and only until a little over 100,000 years ago they dispersed into the rest of the world. A majority of the population moved to the northern hemisphere because at that time they had discovered fire and …show more content…
Even today, we see adaptations that may affect someone in your own family. In central Africa, those who carry the sickle-cell gene in populations that are exposed to malaria are immune to the sickness. Another most common is lactose production. Populations with a long history of cattle herding and milk consumption, metabolize lactose is maintained into adulthood. When we began domesticating cows and goats, the people with the lactose gene could thrive off the milk they produced. Recently, humans have begun losing our wisdom teeth. This is because our third set of molars are coming in, which are there because they were used to eat meat. Eating meat wore down the tooth enamel, therefore needing a new tooth to replace it. Over the past 40,000 years, humans have developed over 1,800 genes, which have the main purpose of fighting infections and diseases like malaria. City dwellers are immune to diseases like tuberculosis and leprosy. Even more recently, scientists have discovered that our brain is in fact shrinking. Over 30,000 years, our brain has decreased from 1,500 cubic cm. to 1,350 cubic cm. which is the size of a tennis ball. This isn 't particularly bad, though. Smaller brains are more efficient in society or community work than basic survival. Our brains are resided to work faster, but take up less room. Smaller brains make us less aggressive, so we can work together instead of tearing each other apart. Back when brains were bigger, everyone in the world had brown eyes. This changed one day when a man, living in cave by the Black Sea was born with blue eyes. His skeletal remains indicated that he was lactose intolerant even though he lived next to a field with remains of domesticated cattle. He had children with blue eyes,Mr. hey had children with blue eyes, and eventually arranged marriages were based off eye color to preserve the mutation. Even today, studies show that men and women with blue eyes have a
Humans first evolved in Africa, and only until a little over 100,000 years ago they dispersed into the rest of the world. A majority of the population moved to the northern hemisphere because at that time they had discovered fire and …show more content…
Even today, we see adaptations that may affect someone in your own family. In central Africa, those who carry the sickle-cell gene in populations that are exposed to malaria are immune to the sickness. Another most common is lactose production. Populations with a long history of cattle herding and milk consumption, metabolize lactose is maintained into adulthood. When we began domesticating cows and goats, the people with the lactose gene could thrive off the milk they produced. Recently, humans have begun losing our wisdom teeth. This is because our third set of molars are coming in, which are there because they were used to eat meat. Eating meat wore down the tooth enamel, therefore needing a new tooth to replace it. Over the past 40,000 years, humans have developed over 1,800 genes, which have the main purpose of fighting infections and diseases like malaria. City dwellers are immune to diseases like tuberculosis and leprosy. Even more recently, scientists have discovered that our brain is in fact shrinking. Over 30,000 years, our brain has decreased from 1,500 cubic cm. to 1,350 cubic cm. which is the size of a tennis ball. This isn 't particularly bad, though. Smaller brains are more efficient in society or community work than basic survival. Our brains are resided to work faster, but take up less room. Smaller brains make us less aggressive, so we can work together instead of tearing each other apart. Back when brains were bigger, everyone in the world had brown eyes. This changed one day when a man, living in cave by the Black Sea was born with blue eyes. His skeletal remains indicated that he was lactose intolerant even though he lived next to a field with remains of domesticated cattle. He had children with blue eyes,Mr. hey had children with blue eyes, and eventually arranged marriages were based off eye color to preserve the mutation. Even today, studies show that men and women with blue eyes have a