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 ...
近日,美国政坛迎来新变动,据美联社报道,克里斯蒂.诺姆(Kristi Noem)在 1 月 25 日经美国参议院投票确认,成为唐纳德.特朗普总统的国土安全部长,并于当日晚宣誓就职。
在中国,每七个成年人中就有一个患有颈椎病。颈椎病这三个字,如今已是悬在所有人头顶的达摩克利斯之剑。北京大学公共卫生学院的学者研究发现,中国成年人的颈椎病发病率为13.76% [1]。