But scientists say a few simple tricks could help you get through the day without anyone ever knowing you've missed your much-needed rest.

科学家告诉我们，几招简单的方法就能让你顺利度过这一天，不会让任何人察觉你一宿未眠，极度渴睡。

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It is being called the Scarf of Hope and it aims to be more than just a symbol of Peru's estimated 15, 000 "disappeared" but a physical reminder that in the majority of cases their relatives live on without ever knowing how they died nor where to find their remains.

BBC: Scarf of Hope to remember Peru's missing

Not only is that a major security issue, but such a lack of knowledge about the mobile workforce would leave any business vulnerable to runaway costs without ever knowing their source.

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