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.
©2016 Scientific American