'A big-hearted optimist': Hans Rosling tributes pour in on social media

Melinda Gates and David Nabarro join worldwide chorus of praise for visionary academic’s work in transforming the way we see the developing worldHow did Rosling work’s affect you? Tell us in the comment thread belowHans Rosling dies at 68
Video: population growth and climate change explained by Hans RoslingTributes have flowed in on social media for Hans Rosling, who died aged 68 on Tuesday. Rosling, a visionary statistician and educator, had a gift for analysing complex development