Contents

16 June 2017
Vol 356, Issue 6343

About The Cover

Cover image expansion

COVER Artist's rendering of the quantum science satellite Micius, distributing two entangled photons to two locations separated by ~1200 kilometers on Earth. This approach is much more efficient than direct transmission through optical fibers, thus opening up a new avenue for global-scale quantum networks and foundational quantum optics experiments in space. See pages 1110 and 1140.
Illustration: C. Bickel/Science; Satellite model credit: Jian-Wei Pan