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The science of sleep can be fuzzy and confusing at times. Researchers are still not sure what our brains are up to, why we dream, or what those dreams even mean. But there are some intriguing things we’ve learnt in recent years about our mind’s journey to the Land of Nod. 睡眠科学有时模糊而令人迷惑。研究人员至今仍不清楚大脑的极限、做梦的原因以及梦的含义。不过近年来，关于梦境之旅，我们发现了一些有趣的现象。 Here are 10 surprising facts from the BBC Future archive and elsewhere that shed some light on why we need a restful night’s sleep: 下列10条来自过去的BBC未来频道和其它来源的惊人事实让我们多少了解为什么需要在晚上舒服的睡一觉 1. Familiar smells can help to form memories in your sleeping brain, improving your performance at simple learning tasks. 1、相似的气味能帮助处于睡眠状态的大脑形成记忆，提高简单学习的效率。 2. The body shudders people report as you fall asleep are surprisingly common, and harmless – they’re called hypnic jerks. 2、人们反映，睡着时抽搐出奇地普遍，而且无害。这叫入睡抽动。 3. One small study proposed that learning the didgeridoo aids sleep, perhaps because it strengthens breathing muscles. 3、一个小型研究表明学习澳洲土著乐器迪吉里杜管有助睡眠，也许是因为这会增强呼吸肌。 | 
