1.25亿年前,地面上、海洋里,恐龙充当着动物世界的领袖,而天空中翼龙则分享着恐龙的霸主地位,鸟类在这个时候也才刚刚学会展开翅膀。但就在此时,一种柔弱的哺乳动物也开始尝试飞行的乐趣了,它就是远古翔兽。远古翔兽体长12～14厦米,体重约70克,大小与小型飞鼠相当,是一种树栖动物。它同时具有特化的牙齿结构和大 125 million years ago, on the ground and in the sea, dinosaurs acted as the leaders of the animal world while the pterosaurs in the sky share the dominance of the dinosaurs. Birds at this time have just learned to spread their wings. But at this moment, a kind of weak mammal also started to try flying pleasure, it is the ancient beast. Ancient Xiangshou body length of 12 to 14 Ha meters, weighing about 70 grams, the size of a small flying squirrel, is an arboreal. It also has a special tooth structure and large