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The study results were published Monday in the journal Proceedings of the National Academy of Sciences of the United States of America. Sakamoto said it is not clear what caused those long declines. The data support the idea that the asteroid impact led to the extinction of a group of creatures that already had problems facing the theory that dinosaurs were doomed in any case. The expert noted that one of the groups in decline still lives in their modern descendants, the birds. It is believed that the asteroid struck on the coast of Mexico's Yucatan Peninsula, causing widespread forest fires and thick smoke that blocked sunlight, in addition to changing climate. Sakamoto analysis is "the best thing to do" given the lack of fossils available at the time, said Mark Norell, chairman of the division of paleontology at the American Museum of Natural History in New York. Most of the data for the report came from North America, with some of Asia and Western Europe, he said, and the conclusion would be stronger if they could be included fossils with a wider geographical distribution. David Fastovsky, chairman of the department of geosciences at the University of Rhode Island in Kingston, said that locating the beginning of the decline at such an early date is striking and unexpected. Undoubtedly, he said paleontologists analyzed the study "very carefully"
Bird stops and leaves a roller coaster passengers upside down The bird landed on the sensor, which activated an emergency procedure immediately stopped the car. Beijing. Several visitors an outstanding amusement park in Beijing was face down almost 20 minutes when a bird stopped at one of the safety sensors attraction. To safeguard the 26 passengers took 18 minutes, he said the Happy Valley Amusement Park following the incident on Saturday afternoon. The roller coasters start again later that day. The bird landed on the sensor, which activated an emergency procedure immediately stopped the car when the road climbed. Ironically, the Happy Valley park on its website describes the feeling of riding on the roller coaster like "fly like a bird."
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