Scientific American, January 2016

In this issue:

"Where Am I? Where Am I Going?": Scientists are discovering how the brain navigates.

"Rings of a Super Saturn": Astronomers have discovered a gargantuan planetary ring system and possibly a moon around another star.

"Death in the Water": Arsenic poisoning from wells is getting worse in India and other parts of Asia, harming millions while scientists scramble to find safer sources.