蜜芽传媒

Chinese state media says its scientists have launched the world's first quantum communication satellite. It will attempt to harness the power of particle physics to build an unbreakable system of encrypted communications. Celeste Biever is the chief news editor for the science journal Nature: what is so special about a quantum satellite?

(Photo: China's quantum satellite - nicknamed Micius after a 5th century BC Chinese scientist - blasts off from the Jiuquan satellite launch centre in China's northwest Gansu province. Credit: Getty Images.)