In this issue:
"Portrait of a Black Hole": Astronomers will get their first look at the dark silhouettes of these invisible cosmic monsters.
"Decoding an Ancient Computer": A complex, ancient Greek mechanism that reveals surprisingly sophisticated technology.
"Methane: A Menace Surfaces": What is being done about the emergence of lakes that emit methane - a heat-trapping gas that could dramatically accelerate global warming.
"The Double Life of ATP": The molecule's dual nature is helping to drive fresh ideas for fighting human diseases.