Reflections on the exit of Voyager 1

Thirty-six years after its launch, Voyager 1 officially leaves the solar system, and Tabitha M. Powledge rounds up some commentary on the spacecraft's conception and construction, and how it manages to stay in contact with mission control after more than three decades. Also, the latest from Mars, where Curiosity once again has not discovered signs of life, and what that means for the future of space exploration. Plus: What's entomogaphy and why does it have a blog?