Study: Ancient Polynesians and South Americans Had Contact
2020-07-13
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1A new study shows that there was mixing between ancient native peoples from Polynesia and South America.
2Researchers say they found a single episode of the two groups interbreeding around 800 years ago after a long trip across the Pacific Ocean.
3For a long time, the question of such contact had been debated among scientists.
4The contact was theorized partly because of the presence of a kind of sweet potato in the islands of Polynesia.
5The plant is native to South and Central America.
6Scientists said last week that an examination of DNA from 807 people made the results clear.
7The genetic material came from 14 Polynesian islands and Pacific coastal Native American populations from Mexico to Chile.
8People from four island areas in French Polynesia had DNA that showed interbreeding with South Americans at around the year 1200.
9Those South Americans were most closely related to present-day native Colombians.
10The islands are about 6,800 kilometers from South America.
11People from Easter Island also had South American ancestry, some from modern Chilean immigrants and some from the same ancient mixing as the other islands.
12Easter Island, which belongs to Chile, was settled sometime after the interbreeding 800 years ago.
13The island, which lies 3,700 kilometers west of South America, is known for its massive stone statues.
14The study left open the question of who crossed the Pacific Ocean.
15Were Polynesians traveling east and arriving in Colombia or maybe Ecuador? Or were South Americans traveling west?
16Alexander Ioannidis is a computational geneticist at Stanford University in California.
17He was the lead author of the research, which appears in the science journal Nature.
18Ioannadis says he thinks the Polynesians crossed the Pacific, since they were "exploring the ocean and discovering some of the most distant Pacific islands around exactly the time of contact."
19The Reuters news agency reported his comments.
20If the Polynesians reached the Americas, he added, they probably traveled in sailing canoes with two hulls.
21He noted these boats operate much like a modern catamaran, another kind of two-hulled boat.
22The contact explains the mystery of how the sweet potato arrived in Polynesia centuries before European sailors.
23Ioannidis noted the vegetable's name in many Polynesian languages - kumara - sounds similar to its name in some languages spoken in the Andes Mountains.
24I'm Alice Bryant.
1A new study shows that there was mixing between ancient native peoples from Polynesia and South America. 2Researchers say they found a single episode of the two groups interbreeding around 800 years ago after a long trip across the Pacific Ocean. 3For a long time, the question of such contact had been debated among scientists. The contact was theorized partly because of the presence of a kind of sweet potato in the islands of Polynesia. The plant is native to South and Central America. 4Scientists said last week that an examination of DNA from 807 people made the results clear. The genetic material came from 14 Polynesian islands and Pacific coastal Native American populations from Mexico to Chile. 5People from four island areas in French Polynesia had DNA that showed interbreeding with South Americans at around the year 1200. Those South Americans were most closely related to present-day native Colombians. 6The islands are about 6,800 kilometers from South America. 7People from Easter Island also had South American ancestry, some from modern Chilean immigrants and some from the same ancient mixing as the other islands. 8Easter Island, which belongs to Chile, was settled sometime after the interbreeding 800 years ago. The island, which lies 3,700 kilometers west of South America, is known for its massive stone statues. 9The study left open the question of who crossed the Pacific Ocean. Were Polynesians traveling east and arriving in Colombia or maybe Ecuador? Or were South Americans traveling west? 10Alexander Ioannidis is a computational geneticist at Stanford University in California. He was the lead author of the research, which appears in the science journal Nature. 11Ioannadis says he thinks the Polynesians crossed the Pacific, since they were "exploring the ocean and discovering some of the most distant Pacific islands around exactly the time of contact." The Reuters news agency reported his comments. 12If the Polynesians reached the Americas, he added, they probably traveled in sailing canoes with two hulls. He noted these boats operate much like a modern catamaran, another kind of two-hulled boat. 13The contact explains the mystery of how the sweet potato arrived in Polynesia centuries before European sailors. Ioannidis noted the vegetable's name in many Polynesian languages - kumara - sounds similar to its name in some languages spoken in the Andes Mountains. 14I'm Alice Bryant. 15Reuters news agency reported this story. Alice Bryant adapted it for Learning English. George Grow was the editor. 16__________________________________________________________ 17Words in This Story 18episode - n. an event or a short period of time that is important or unusual 19interbreed - v. to breed or cause to breed with another of a different race or species 20theorize - v. to think of or suggest ideas about what is possibly true or real : to form or suggest a theory about something 21DNA - n. a substance that carries genetic information in the cells of plants and animals - often used before another noun 22author - n. a person who has written something 23hull - n. the main body of a boat or ship, including the bottom, sides, and deck but not the masts and other parts