Scientists learned recently that fish was the main source of protein for people in southern Scandinavia many thousands of years ago. They also ate other animals that live in the water. The findings come from Lund University in Sweden. Scientists there tested ancient human bones from more than 80 individuals.
One of the researchers was Adam Boethius. He says by studying the chemistry of the bones, they learned the diet of the people they belonged to.
Basically you are what you eat. And so when you study this -- stable isotopes -- you get an indicator of what the humans have been eating.
The study examined the importance of a mix of protein sources in the human diet from around 10,500 to 7,500 years ago. They found that in Scandinavia most of what people ate came from the sea.
Boethius said back then, fish made up 50 to 70 percent of the diet. He said other sea animals like seals and dolphins brought that percentage to almost 100 percent.
This research changed the understanding of how ancient people of the area lived. Earlier studies suggested these people hunted big animals and moved around a lot to follow them. But the chemical examinations did not show proteins linked to deer and elk and other land animals of the time.
Boethuis said scientists now believe these people stayed in place for most of their lives and ate local food. The discovery, he argued, provides evidence that settlements appeared in Scandinavia much earlier than researchers once believed.
I'm Anna Matteo.
1. live in 居住在
Members of 21 minorities live in this area.
2. come from 来自于
He's just come from the countryside.
3. belong to 属于
They belong to someone.
4. make up 组成
Some people do seem to have an aptitude for those qualities that make up the entrepreneurial spirit — but they can be learned.
近日，科学家了解到鱼类是数千年前斯堪的纳维亚南部人民获取蛋白质的主要来源。除此之外，他们还以其他水族生物为食 。这是瑞典隆德大学发现的 。该大学的科学家测试了80多具古代人类的骨骸 。
其中一位研究人员名为亚当（Adam Boethius）。他表示，通过研究骨骸的化学成分，他们了解了骨骸主人的食谱 。
这项研究改变了我们对该地区古代人民生活方式的理解。此前有多项研究表明，这些人捕捉了很多大型动物，还跟随大型动物的踪迹而变动住所 。但化验并未显示其中含有当时就有的鹿、麋鹿等陆地生物的蛋白质 。
安娜 马泰奥（Anna Matteo）为您播报。