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.

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

In the hospital, where their family member lay gravely ill, the relatives gathered in the waiting room. Finally, the doctor ...

一个小孩在划龙舟，有两只非常巨大的金鱼从河水里跳跃到半空，水花四溅，河流街道两旁是中国传统建筑，金光闪闪，挂着红灯笼，营造出浓郁的春节节日气氛，两岸还有游客行走。晚上深蓝的星空还有烟花。