The Most Accurate Clock In The Universe

A Chinese-made timepiece designed to be precise forever is currently floating above the Earth aboard the Tiangong II space lab. Yang Chunxue and Yu Fei report for China Features at Xinhua News Agency.

While stargazers are focused on the two Chinese astronauts aboard the space lab Tiangong II, scientist Liu Liang is watching the time.

More specifically, he is watching the time on a "cold-atom" clock that he and his team have spent 10 years perfecting.