Assorted Links

1. The world’s largest subway system goes cashless as Shanghai Metro adopts QR code
   
   
   
   
2. Fitness tracking app Strava data gives away location of secret US army bases
   
   
   
   
3. Marriages have on average long lasting positive effects on well-being and life satisfaction HT Cesar Hidalgo I cannot confirm nor deny
   
   
   
   
4. Most Americans didn't approve of Martin Luther King Jr. before his death
   
   
   
   
5. Sprawling Mayan 'cities' uncovered under Guatemala jungle using LIDAR data - "The study estimates that roughly 10 million people may have lived within the Maya Lowlands"
   
   
   
   
6. What factors are associated with population projection accuracy? by Guangqing Chi and Donghui Wang
   
   
   
   
7. The World's 15 Most Complex Subway Maps and our cognitive limits: "Multimodal transportation systems in large cities have thus already exceeded human cognitive limits and, consequently, the traditional view of navigation in cities has to be revised substantially"
   
   
   
   
8. The total seasonal snowfall in the continental US for 2017–Jan 2018, shown as a relief map. Beautiful dataviz by Garrett Dash Nelson