500斤重的巨袋鼠怎么跳起来

Core Insights - The article discusses the discovery of the giant kangaroo, a prehistoric species that could reach heights of over two meters and weigh up to 250 kilograms, significantly larger than today's red kangaroo [1][3]. Group 1: Research Findings - Scientists from the University of Manchester and the University of Bristol analyzed a "skeletal evidence database" comprising 63 existing kangaroo species and 40 fossil samples of extinct giant kangaroos, focusing on the strength of their fourth metatarsal bones [3]. - The research revealed that even the largest species, weighing close to 250 kilograms, had metatarsal bones that were "sturdy and resilient," capable of withstanding the stress of jumping [3][4]. - The study also examined the efficiency of the tendons and bones involved in jumping, concluding that the giant kangaroo had a robust anatomical structure suitable for powerful leaps [4]. Group 2: Behavioral Insights - The article suggests that the giant kangaroo likely employed a "hybrid" movement strategy, walking in a more energy-efficient manner most of the time and only jumping explosively in emergencies, such as when escaping predators [4]. - This behavior mirrors that of smaller mammals today, which use occasional bursts of jumping to evade threats, indicating a complex survival strategy in prehistoric ecosystems [4].