Chinese science teleported into the lead in quantum race

China has become the first country to send quantum keys - highly complex encryptions - from a satellite to a base on Earth, and to teleport light particles the other way.

The accomplishments are two major breakthroughs in the effort to create an unhackable global communications network.

The two experiments mark the completion of the the second and third of the three main goals of Micius, the world's first quantum communications satellite, which China launched last year.