A new study done by researchers at Bern Institute of Psychology reveals that we can learn even while we are asleep.
The participants in the study used a headphone to listen to an artificial language while they were sleeping. When awake they heard the actual German translation of those words. The participants could associate the correct words in the German and artificial language they heard in different states of mind. The researchers Katharina Henke, Marc Zust and Simon Ruch concludes that the language area which is the left hemisphere of the brain for most people and the hippocampus are active even while asleep.
The implication of the study is that people can use the sleep time productively and not be worried about losing or wasting time. It also has the twin benefits of providng rest to your body.