Why the sky is blue

Related: Technology & science

1. Headlines
   1. House GOP: No to asteroid, yes to moon and Mars

      House Republican leaders want to push for outposts on the moon and Mars — and they want to push NASA's plan to snare an asteroid into the dustbin, according to a discussion draft of their space spending plan.

   2. Battery tests show Apple's new MacBook Air beats competitors by a mile
   3. Sorry, Bieber! Rihanna is the most viewed artist on YouTube
   4. How the PlayStation 4's hardware will bring a new realism to video games
   5. Apple TV gets HBO Go, WatchESPN
   6. East Coast seafloor home to trove of gas seeps
   7. Ancient latrine reveals parasites infected crusaders
2. Multimedia
   1. 
      Video
      Toxic levels found at Fukushima's nuclear plant 
   2. 
      Video
      Sci-fi game 'Killzone: Shadow Fall' was inspired by Cold War Berlin
   3. 
      Video
      Mexico volcano spews ash two miles high
   4. 
      Video
      How the PlayStation 4's hardware will bring a new realism to video games