Read the text and answer the questions “Scientists have found the oldest DNA evidence yet of humans’ biological history. But instead of neatly clarifying human evolution, the finding is adding new mysteries. In a paper in the journal Nature, scientists reported Wednesday that they had saved ancient human DNA from a fossil dating back about 400,000 years, shattering the previous record of 100,000 years.
The mismatch between the anatomical and genetic evidence surprised the scientists, who are now rethinking human evolution over the past few hundred thousand years. It is possible, for example, that there are many extinct human populations that scientists have yet to discover. Right now, we’ve basically generated a big question mark,” said Matthias Meyer, a geneticist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, and a co-author of the new study.
Finding such ancient human DNA was a major advance, said David Reich, a geneticist at Harvard Medical School who was not involved in the research. “That’s an amazing, game-changing thing,” he said.
When Dr. Meyer and his colleagues found ancient human DNA inside they thought that it would be a very early Neanderthal,” Dr. Meyer said.
But the DNA did not match that of Neanderthals. Dr. Meyer then compared it to the DNA of the Denisovans, the ancient human lineage that he and his colleagues had discovered in Siberia in 2010. He was shocked to find that it was similar. Everybody had a hard time believing it at first, Dr. Meyer said. So we generated more and more data to nail it down. The extra research confirmed that the DNA belonged on the Denisovan branch of the human family tree. The new finding is hard to settle with the picture of human evolution that has been emerging based on fossils and ancient DNA…
Hints at new hidden difficulties in the human story came from a 400,000-year-old bone found in a cave in Spain called “the pit of bones”. The scientific team used new methods to extract the ancient DNA from the fossil and ancient DNA…
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26 марта на моих глазах произошло чрезвычайное происшествие . Около в 12 часов дня,идя в школу я увидел как две машины с разных сторон врезались в друг друга. Очевидцы побежали вытаскивать водителей из машины . Примерно через 5-10 минут приехала скорая но ещё раньше подъехали полицейские машины. Одному из водителю было очень плохо, он истекал кровью и его увезли. Это происшествие одно из тех страшных ,что я видел . Машины были в ужасном состоянии ,было очень страшно . Но мне пришлось уйти с того места и это все,что я помню на счет той аварии.
Писала сама! Так что не знаю правильно или нет
2. The capital of Scotland is Edinburgh.
3. Glasgow, Aberdeen and Dundee are the other big cities I can name.
4. The thistle is the national symbol of Scotland.
5. St Andrew is the patron saint of Scotland.
6. Scotland is washed by the Atlantic Ocean in the north and west and by the North Sea in the east.
7. I know the River Tay, the River Clyde and the River Spey.
8. Scotland is well-known for its beautiful landscape and castles, there are many mountains, lakes and waterfalls. Men can often be seen wearing a kilt, which is a traditional skirt-type piece of clothing for men. Bagpipe is the national musical instrument of Scotland which is almost always played during all main ceremonial processions. The most infamous Scottish dish is haggis which is made with the heart, liver, and lungs of a sheep and boiled in the animal's stomach.