在小行星撞击之前, 新的化石证据显示, 恐龙在北美各地蓬勃发展。 Dinosaurs thrived across North America just before the asteroid impact, new fossil evidence shows.

新墨西哥州圣胡安盆地(San Juan Basin)的一个新研究站点在大约6600万年前就已揭晓了多种恐龙化石 — — 包括巨型阿拉莫龙 — — 表明在小行星撞击之前恐龙数量迅速增加。 A newly studied site in New Mexico’s San Juan Basin, dated to about 66 million years ago, reveals diverse dinosaur fossils—including the massive Alamosaurus—indicating thriving dinosaur populations just before the asteroid impact. 科学家们利用磁场数据和辐射测算日期,确认该站点的年龄与《地狱溪形成》一致,对长期持有的灭绝前衰落理论提出了挑战。 Using magnetic field data and radiometric dating, scientists confirmed the site’s age aligns with the Hell Creek Formation, challenging long-held theories of a pre-extinction decline. 在《科学》中发表的研究结果表明,恐龙在生态上是健康的,在北美洲很普遍,小行星的撞击很可能造成其突然灭绝,而不是长期的环境压力。 The findings, published in Science, suggest dinosaurs were ecologically healthy and widespread across North America, with the asteroid strike likely causing their sudden extinction rather than prolonged environmental stress.