段落1
Listen to part of a lecture in an Archaeology class
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So, one thing archeologists had pretty much agreed on, for a while now, is that the first migration of humans out of Africa to Europe, began about 42,000 years ago.
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We believe they first settled in southern and Western Europe and we knew this from evidence found at sites in those areas, artifacts that this culture left behind.
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These sites and these artifacts are referred to as Aurignacian.
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Now, during the Aurignacian era there was a surge of, well, creativity, uh, ingenuity in human behavior and skills and one of the defining characteristics of the era is representational art, art created to resemble something, sculptures of human figures, things like that.
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And, well, a few years ago some archeologists made an interesting discovery in Russia, in Kostenki.
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As you can see, Kostenki is south of Moscow, about 400 kilometers south.
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It’s on what is called the central East European Plain.
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Near this village is a prehistoric site or group of sites, actually.
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And these archeologists at Kostenki uncovered some artifacts that are clearly Aurignacian in origin.
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For instance, they found a carved head of an unfinished human figurine made of ivory, representational art, right?
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There were also personal ornaments and tools for digging, drilling, and cutting, all of them indicative of the Aurignacian era.
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And they were all found buried well below the level of previous discoveries of the same site.
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So we can be reasonably sure they are older.
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Not only that but there are reasons to believe that these artifacts are a good deal older than any that had previously been found much further west in what we have thought were the first Aurignacian settlements.
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You can see why this is important, now, because if these artifacts are indeed that old, then theories of a direct migration into western and southern Europe are called into question.
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Humans must have settled in the central East European Plain first, several thousands of years before ways of migration went west and south.
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That’s why it’s crucial to get the dating right.
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And our archeologists at Kostenki are convinced that the ivory head and other artifacts are over 42,000 years old, maybe as old as 45,000 years.
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Now, unfortunately that far back it gets harder to date things.
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We can’t expect to get an accurate reading from radiocarbon dating.
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The technology just isn’t that reliable at dating things over 40,000 years old.
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So how did they manage to date the Kostenki artifacts then?
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Well, right around that time, 40,000 years ago, there was a large volcanic eruption in what is now Italy.
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This volcano spewed out a layer of ash that settled onto the ground all across central and eastern Europe.
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And that layer serves as a pretty reliable time marker.
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The date of the eruption has been quite well established by means that I’m not going to get into right now.
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And guess what? The Kostenki artifacts, the ivory head and all, they were found well beneath this layer.
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All of this points to an Aurignacian settlement several thousand years older than any we found elsewhere in Europe.
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But it is somewhat perplexing in a way, I mean, the climate at Kostenki, we’re talking significantly colder at that time than areas to the west and south.
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Now I’m not saying these people couldn’t have handled such conditions.
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I mean, among the artifacts found were needles made from ivory and bone that were likely used for sawing. So, they were probably able to keep warm wearing animal hides.
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But we’d still like to be able to explain why a group of people would migrate to such a cold climate directly from the warm climate of Africa.
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Did they somehow prefer the cold weather?
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Well, we’ll leave that discussion for next time.
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显示原文 =Listen to part of a lecture in an Archaeology class
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显示原文 =So, one thing archeologists had pretty much agreed on, for a while now, is that the first migration of humans out of Africa to Europe, began about 42,000 years ago.
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显示原文 =We believe they first settled in southern and Western Europe and we knew this from evidence found at sites in those areas, artifacts that this culture left behind.
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显示原文 =These sites and these artifacts are referred to as Aurignacian.
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显示原文 =Now, during the Aurignacian era there was a surge of, well, creativity, uh, ingenuity in human behavior and skills and one of the defining characteristics of the era is representational art, art created to resemble something, sculptures of human figures, things like that.
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显示原文 =And, well, a few years ago some archeologists made an interesting discovery in Russia, in Kostenki.
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显示原文 =As you can see, Kostenki is south of Moscow, about 400 kilometers south.
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显示原文 =It’s on what is called the central East European Plain.
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显示原文 =Near this village is a prehistoric site or group of sites, actually.
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显示原文 =And these archeologists at Kostenki uncovered some artifacts that are clearly Aurignacian in origin.
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显示原文 =For instance, they found a carved head of an unfinished human figurine made of ivory, representational art, right?
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显示原文 =There were also personal ornaments and tools for digging, drilling, and cutting, all of them indicative of the Aurignacian era.
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显示原文 =And they were all found buried well below the level of previous discoveries of the same site.
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显示原文 =So we can be reasonably sure they are older.
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显示原文 =Not only that but there are reasons to believe that these artifacts are a good deal older than any that had previously been found much further west in what we have thought were the first Aurignacian settlements.
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显示原文 =You can see why this is important, now, because if these artifacts are indeed that old, then theories of a direct migration into western and southern Europe are called into question.
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显示原文 =Humans must have settled in the central East European Plain first, several thousands of years before ways of migration went west and south.
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显示原文 =That’s why it’s crucial to get the dating right.
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显示原文 =And our archeologists at Kostenki are convinced that the ivory head and other artifacts are over 42,000 years old, maybe as old as 45,000 years.
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显示原文 =Now, unfortunately that far back it gets harder to date things.
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显示原文 =We can’t expect to get an accurate reading from radiocarbon dating.
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显示原文 =The technology just isn’t that reliable at dating things over 40,000 years old.
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显示原文 =So how did they manage to date the Kostenki artifacts then?
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显示原文 =Well, right around that time, 40,000 years ago, there was a large volcanic eruption in what is now Italy.
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显示原文 =This volcano spewed out a layer of ash that settled onto the ground all across central and eastern Europe.
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显示原文 =And that layer serves as a pretty reliable time marker.
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显示原文 =The date of the eruption has been quite well established by means that I’m not going to get into right now.
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显示原文 =And guess what? The Kostenki artifacts, the ivory head and all, they were found well beneath this layer.
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显示原文 =All of this points to an Aurignacian settlement several thousand years older than any we found elsewhere in Europe.
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显示原文 =But it is somewhat perplexing in a way, I mean, the climate at Kostenki, we’re talking significantly colder at that time than areas to the west and south.
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显示原文 =Now I’m not saying these people couldn’t have handled such conditions.
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显示原文 =I mean, among the artifacts found were needles made from ivory and bone that were likely used for sawing. So, they were probably able to keep warm wearing animal hides.
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显示原文 =But we’d still like to be able to explain why a group of people would migrate to such a cold climate directly from the warm climate of Africa.
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显示原文 =Did they somehow prefer the cold weather?
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显示原文 =Well, we’ll leave that discussion for next time.
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- 单句循环:关
- 单句循环:×3
- 单句循环:×5
- 单句循环:∞