奇怪的前脚印蜥脚类恐龙留下的化石脚印令科学家们觉得非常奇怪,它们只留下了两只前脚的脚印,这是怎么回事呢?加拿大卡尔加里大学以及美国密歇根大学的研究人员经过研究得出结论:这些庞然大物在涉水过河的时候,可能是用两只前脚撑在河床上趟水过去的。某些蜥脚类动物身上可能有 Strange footprints Fossil footprints left by sauropods make scientists feel very strange that they left only the footprints of their two front legs. What happened to them? Researchers at the University of Calgary in Canada and at the University of Michigan, USA The study concluded that these giants may have used two forefoots to drown in riverbeds when wading across the river. Some sauropods may have