In this issue:
"The Brain Boosting Power of Video Games": Shooting zombies and repelling aliens can lead to lasting improvement in mental skills.
"Our Place in the Cosmos": The Milky Way turns out to be part of a massive supercluster of galaxies that forms one of the largest known structures in the universe. This discovery is only the beginning of a new effort to maps the cosmos.
"Ebola's Second Coming": Brain deficits and more torment many virus survivors in Liberia. The top suspects are hidden viral remnants and immune system overreactions.
"Drilling for Earthquakes": Scientists are increasingly confident about the link between earthquakes and oil and gas production, yet regulators are slow to react.