近日，一位即将告别抖音集团的员工，在离职前夕特意向TikTok首席执行官周受资及字节跳动首席执行官梁汝波发送了深情的告别信息。这一举动不仅体现了员工对公司的深厚情感，更意外收获了来自高层的温馨回应。

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.