亚马逊公司 (Amazon.com Inc.)股价周四下跌，此前该公司预计的销售额和营业利润低于预期，并表示今年计划投入创纪录的资本支出，用于构建人工智能 (AI)基础设施。

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