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.

马斯克的公然唱反调，也表明他与特朗普之间出现了罕见的分歧。要知道，马斯克一向是力挺特朗普的，他先是在竞选中为特朗普豪掷2.7亿美元，然后又在特朗普的新政府里扮演了重要角色。