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A new way of pulling DNA1 from soft materials such as bones, teeth and tusks2 makes it easier for scientists to find out about objects made by ancient people.
As a result, researchers are working to learn about those who made and wore objects taken from a cave in what is now far eastern Russia.
Elena Essel is with the Max Planck Institute for Evolutionary3 Anthropology4 in Germany. She is the lead writer of a study recently published in the journal Nature. She and her team say they now know a lot about jewelry5 made 20,000 years ago -- and who wore it.
Essel is a molecular6 biologist. She called the old items, such as an animal's tooth with a hole punched through it, "extremely fascinating."
The scientists say a Stone Age woman wore the pendant. The piece of jewelry was carefully recovered from the Denisova Cave in Siberia.
The new way of looking at DNA permits researchers to link one item, such as a piece of jewelry, to one person. The researchers only know very basic things about the person beyond their DNA. The DNA comes from sweat, bodily fluids or skin cells.
They study the DNA at a lab in Leipzig, Germany. Scientists place the item into a liquid that "washes" out the DNA. They can then look at the liquid and find out about the people who once held the item.
In this case, they say the pendant belonged to a woman who lived between 19,000 and 25,000 years ago. They could not say if the woman made it or only wore it.
Essel said the new DNA science permits her to "travel back and have a glance into these people's lives."
Essel said holding the item in her hand transported her back in time and she could imagine the person who made it.
She thought of a lot of questions, such as: "Who was the person who made it? Was this tool passed down from one generation to the next, from a mother to a daughter or from a father to a son?"
Essel added, "That we can start addressing these questions using genetic7 tools is still absolutely incredible to me."
Words in This Story
journal –n. a magazine that reports items of special interest to small group of people
jewelry –n. decorative8 objects people wear on their body
fascinating –adj. very interesting
pendant –n. a piece of jewelry worn around the neck
glance –v. to look quickly at something
incredible –adj. hard to believe
1 DNA | |
(缩)deoxyribonucleic acid 脱氧核糖核酸 | |
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2 tusks | |
n.(象等动物的)长牙( tusk的名词复数 );獠牙;尖形物;尖头 | |
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3 evolutionary | |
adj.进化的;演化的,演变的;[生]进化论的 | |
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4 anthropology | |
n.人类学 | |
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5 jewelry | |
n.(jewllery)(总称)珠宝 | |
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6 molecular | |
adj.分子的;克分子的 | |
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7 genetic | |
adj.遗传的,遗传学的 | |
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8 decorative | |
adj.装饰的,可作装饰的 | |
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