Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.

东部战区空军航空兵某旅机场，战斗警报骤然响起，值班战机挂载实弹迅速升空。记者观察发现，没有预先准备，没有等级转进，所有参训要素立即由“训”转“战”。 几乎同一时间，千里之外的联勤保障部队某基地保障队训练场传来阵阵轰鸣声。正在此处采访 ...

记者从国防部获悉，经双方商定，中国人民解放军东部战区代表团将于1月中旬访问日本。期间，代表团将会见日本防卫省、自卫队联合参谋部领导，参访有关军事单位。此访有助于增进双方理解互信，促进中日防务交流。（李姝睿） ...