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
Sleep characterized primarily by deep sleep and the second by REM sleep. Some societies display a fragmented sleep pattern in which people sleep at all times of the day and night for shorter periods. In many nomadic or hunter-gatherer societies, people will sleep on and off throughout the day or night depending on what is happening. Plentiful artificial light has been available in the industrialized West since at least the mid-19th century, and sleep patterns have changed significantly everywhere that lighting has been introduced. In general, people sleep in a more concentrated burst through the night, going to sleep much later,