In this issue:
"King of Beasts": What happened to all of the large carnivore species that used to roam Africa?
"World with Two Suns": Astronomers are discovering distant planets that orbit two-star systems, uncovering bizarre and wondrous worlds unlike anything in our solar system.
"Hacking Drones": Drones’ security flaws allow them to be readily hijacked with simple technology.
"The One-Stop Carbon Solution": An ingenious plan that involves burying carbon while providing fuel for electricity.
©2012 Scientific American