Continual learning remains an unsolved problem in artificial neural networks. The brain has evolved mechanisms to prevent catastrophic forgetting of old knowledge during new training. Building upon data suggesting the importance of sleep in learning and memory. we tested a hypothesis that sleep protects old memories from being forgotten after new learning. https://www.bekindtopets.com/great-choice-Blue-Marble-Galaxy-Buds-Skin-p33147-best-mega/