Turandot out Turandot's command: "Cosi comanda Turandot" – "This night, none shall sleep in Peking! The penalty for all will be death if the Prince's name is not discovered by morning". The Prince waits for dawn and anticipates his victory: "Nessun dorma" – "Nobody shall sleep!" Ping, Pong, and Pang appear and offer the Prince women and riches if he will only give up Turandot ("Tu che guardi le stelle"), but he refuses. A group of soldiers then drag in Timur and Liù. They have been seen speaking to the Prince, so they must know his name. Turandot enters and orders
Neuroscience of sleep many older adults spend time awake in bed after sleep onset in an inability to fall asleep and experience marked decrease in sleep efficiency. There may also be some changes in circadian rhythms. Studies are ongoing about what causes these changes and how they may be reduced to ensure comfortable sleep of old adults. Understanding the activity of different parts of the brain during sleep can give a clue to the functions of sleep. It has been observed that mental activity is present during all stages of sleep, though from different regions in the brain. So, contrary to popular understanding,