The first one that we see occurs in the ancient rain forests of Australia and the National Geographic Society is helping us to explore these fossil deposits. This is Riversleigh.
最早的袋狼出现在2500万年前 澳大利亚的古热带雨林中。 国家地理协会正帮助我们 勘探那儿的化石沉积物。这里是里弗斯利，