Elemental: There must be a way of improving sleep and its impact on memory.

During slumber, our brain cannot acquire new, complex information (facts, words, and images), but it can be “manipulated to strengthen the memory of recently acquired information,” report Cellini and Mednick. A review last year, appearing in the Journal of Neuroscience Methods, explored the latest therapies that target memory during sleep. While past research focussed on periods of rapid eye movement (REM) sleep (small, fast eye movements associated with dreaming), science has begun to explore other aspects of our unconscious downtime.