• Video: Greatest threat to Africa's white lions: American hunters
  Very few white lions live in the wild today, but Linda Tucker is on a mission to change that. She left behind her life in Paris and founded the Global White Lion Protection Trust, dedicated to saving the African white lions.
  
  
• Reports: Yahoo to acquire Tumblr for $1.1B
  New CEO Melissa Meyer hopes to attract more traffic and advertisers with social media company's blogging site and mobile apps
  
  
• Obama to discuss legality of drone program
  In a speech this week, the president will defend various counterterrorism practices drawing ire
  
  
• How design colors the mind
  The psychology of design and color has been applied to analysts' offices, jails, even locker rooms to surprising effect
  
  
• 16-year-old finds a new way to detect cancer
  Jack Andraka's innovative mind led him to create a new approach in finding pancreatic, ovarian and lung cancer
  
  

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