Cornell University

'Zones of Rebellion: Kurdish Insurgents and the Turkish State' by Ay?egül Ayd?n and Cem Emrence (Cornell University Press, 208 pages, $39) 

NASA's Opportunity Mars rover has become the first human-made vehicle to complete a marathon on another planet -- a feat accomplished in a record time of no less than 11 years.
      

Conference raises 1.8 billion euros for Balkan flood relief

Facebook secretly manipulated the feelings of 700,000 users to understand "emotional contagion" in a study that prompted anger and forced the social network giant on the defensive.
     
For one week in 2012, Facebook tampered with the algorithm used to place posts into users' news feeds to study how this affected their mood, all without their explicit consent or knowledge.