Negative selection, Positive selection, Stabilizing selection

"Negative selection… Positive selection… stabilizing selection…." Every day, the world welcomed about 390000 new lives, or a baby was born at an average of 0.24 seconds. In other words, a blink and 5 babies would have been born. If one collected the first cry of each baby in one day, it would be a powerful supersonic attack; It basically had the same effect in Gu Jun's mind now. Negative selection, positive selection, stabilizing selection… Innumerable young voices twisted together to smash against his nerves and mind. 

From the moment Gu Jun followed Wang Ruoxiang, Cai Zixuan and the rest to First People Hospital, he could hear the waves of sound already. When he reached the isolated baby nursery, the veins in his body popped. But even so he could not be sure if the voices were real or he was just imagining them.