They discovered that the neurons of the 8 middle aged mice in the culture dish had irregular daily electrical activities, while the cells of the 12 young mice kept strict rhythm.

• 他们发现培养在培养皿中的八个中年小鼠神经元，每日的电活动不规则，而12个年轻成年小鼠细胞则保持严格的节律性。