我们都知道,猫咪和狗狗是侧身躺着睡觉的,牛和羊是跪着睡觉的,可你一定不知道,马是站着睡觉的!哇,好神奇!这是为什么呢?原来,马的祖先是野马,生活在广阔的草原上,常会面对猛兽袭击,可野马没有狮子尖利的牙齿,也没有老虎有力的尾巴,更没有刺猬身上的利刺,无法和猛兽搏斗,所以只能时时刻刻保持警惕。野马的感觉器官很发达, We all know that cats and dogs are lying sideways to sleep, cattle and sheep are kneeling to sleep, but you do not know, the horse is standing to sleep! Wow, so amazing! Why? The ancestors are wild horses, living in vast grasslands, often facing the beast attack, the wild horse can not have sharp teeth of the lion, nor the tiger’s powerful tail, nor the hedgehog thorn, can not fight with the beasts, so only when Be vigilant at all times. Mustang sensory organs are well developed,