In China, scientists take and shave mice, and then begin to irradiate them with ultraviolet light.
After that, the experiment begins, comparing irradiated and non-irradiated individuals. As a result, mice with "tan" improved their cognitive ability - they started learning faster and better remembering new information.
Is such a method "pumping" the activity of neurons to someone incomprehensible. The mice are night and night, but people have different reactions to the ultraviolet. From the positive development of vitamin D, to negative moments such as the occurrence of skin cancer.