Related: Frontiers

1. Innovation
   1. Plant parts used to generate electricity
   2. Robot learns to recognize objects on its own
   3. Navy's X-47B drone makes first carrier-style landing
   4. Bug-eyed camera gets wide angle view - through 180 lenses
   5. Solar plane makes first stopover in US odyssey
2. Tech & science
   1. NASA unveils Grand Challenge to hunt asteroids
   2. Facebook may add videos to Instagram, rumors suggest
   3. Last telegraph shuts down in July but some say "Don't. Stop."
   4. Catherine the Great, Tchaikovsky letters returned
   5. Sally Ride and Neil Armstrong: Space icons honored
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