1986 年 10 月 7 日，美国亚利桑那州的一些保存完好的恐龙骨架化石被科学家发现。据考古学家测定，这些化石已经有二亿二千五百万年的历史，是目前为止世界上发现的最古老的恐龙化石。专家们认为，这次发现的恐龙是一种科学上还不知道的新的恐龙种。
此次发现的恐龙化石包括四个完整的骨架和多个部分，尽管化石已经经历了漫长的岁月，但它们的细节仍然清晰可见。这些化石提供了对这些古老生物生活方式的惊人的见证，同时也让我们更加深入地了解了恐龙时代的生态和环境。
此次发现的最古老恐龙化石的发现时间为 1986 年，地点位于美国亚利桑那州。这些化石被认为是一种新的恐龙种，并且是科学上尚未了解的。这个发现为科学家们提供了一种研究恐龙进化的独特视角，同时也让我们更加深入地了解了恐龙时代的生态和环境。
新闻翻译：
Title: Oldest dinosaur fossils discovered in Arizona, U.S.
Keywords: Arizona, oldest dinosaur fossils, new dinosaur species
On October 7th, 1986, some well-preserved dinosaur skeletons were discovered by scientists in Arizona, the United States. According to archaeologists, these fossils are 225 million years old, making them the oldest dinosaur fossils found to date. Experts believe that this new dinosaur species has not yet been identified scientifically.
The fossils discovered include four complete skeletons and several parts, despite having been 经历了漫长的岁月，它们的细节仍然清晰可见。这些化石提供了对这些古老生物生活方式的惊人见证，同时也让我们更加深入地了解了恐龙时代的生态和环境。
The discovery of the oldest dinosaur fossils in Arizona occurred in 1986, and the location was the U.S. state of Arizona. These fossils are believed to be a new dinosaur species that has not yet been identified scientifically. This discovery provides scientists with a unique perspective for studying dinosaur evolution, and also 让我们更加深入地了解了恐龙时代的生态和环境。
【来源】https://baike.so.com/doc/6142550.html
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