30 January 2015
Vol 347, Issue 6221

About The Cover

Cover image expansion

COVER Data pour out of us and our devices every second of every day, and people no longer control their personal privacy. Understanding how these data streams can be used will help us to cope with the consequences. For a key to the data in the art on the cover and on page 490 (high-res version), search for an encrypted URL and decode it.
Photo illustration By William Duke / Photo by Ronald Hudson/