Migration
As I have said in my earlier posts humans first evolved in Africa, according to the national Geographic the first homo sapiens fossils were found in Omo Kibish in Ethiopia, they are dated from around 200,000 years ago. In my earlier post I briefly mentioned when we moved to each continent. This time I will be going into it in greater detail.
Haplogroups. These are the different DNA groups found across the world. Each major group is given a different letter of the alphabet and the sub groups have their own unique code. From what I could find there are groups ranging from A-T. The difference in the DNA of people in one haplogroup to another is only slightly different, the changes came about due to mutations and the adaptions homo sapiens made on their travels while being exposed to new conditions and surroundings. We could say that these different DNA groups separate people into "breeds" it could be controversial but I am only going to use it to keep things simple. These haplogroups can be used to identify where your "breed" first came about and where they traveled to. This can be done by taking a DNA test, get your DNA categorized into a haplogroup and then find out where fossils with your haplogroup were found. There are loads of maps online showing you where these haplogroups created routes across the world. The National Geographic have a basic but good interactive map showing you some of these routes, I will post a link in the comments.
The most common haplogroup in Ireland is R1b, it supposed to have first arrived in Europe 40,000-30,000 from West Asia during a warm period. There is much debate over where and when haplogroups arrived and mutated. I read on another blog, which was all about genetics, about how the R1 group was split in two (roughly), R1a and R1b, during the ice age after the R1 group landed in Europe but in the comments some one was saying that, that was not how it happened. The person in the comments said the R1a and R1b groups came to Europe separately with R1a coming from the area near India and R1b coming from Western Asia. That is just one example of a difference of opinion or people getting the wrong facts, I personally do not know which one is true, it is very hard to find reliable information on this topic. This is due to the relatively short time scientists have been studying this for.
What caused homo sapiens to migrate? Well a lot of events have occurred over time which are very relevant to geography, there were the ice ages, extremely cold times where humans avoided as best they could, the opposite with droughts and famines causing people to move in search of water or food for survival, when a hunter gather's spot became depleted, then there is the basic human instinct of curiosity and linked to ourselves we have war and greed, some haplogroups or civilizations attacking others for land, food and wealth. Not only did the geography have an effect on where and how humans lived but we also had a hand in changing the geography of the earth. You'll have to wait for the next post though for that.
The most common haplogroup in Ireland is R1b, it supposed to have first arrived in Europe 40,000-30,000 from West Asia during a warm period. There is much debate over where and when haplogroups arrived and mutated. I read on another blog, which was all about genetics, about how the R1 group was split in two (roughly), R1a and R1b, during the ice age after the R1 group landed in Europe but in the comments some one was saying that, that was not how it happened. The person in the comments said the R1a and R1b groups came to Europe separately with R1a coming from the area near India and R1b coming from Western Asia. That is just one example of a difference of opinion or people getting the wrong facts, I personally do not know which one is true, it is very hard to find reliable information on this topic. This is due to the relatively short time scientists have been studying this for.
What caused homo sapiens to migrate? Well a lot of events have occurred over time which are very relevant to geography, there were the ice ages, extremely cold times where humans avoided as best they could, the opposite with droughts and famines causing people to move in search of water or food for survival, when a hunter gather's spot became depleted, then there is the basic human instinct of curiosity and linked to ourselves we have war and greed, some haplogroups or civilizations attacking others for land, food and wealth. Not only did the geography have an effect on where and how humans lived but we also had a hand in changing the geography of the earth. You'll have to wait for the next post though for that.
Here is that link of the map from the National Geographic I said I would post.
ReplyDeletehttps://genographic.nationalgeographic.com/human-journey/