Tim Harford, Bbc
London, England, United Kingdom
Bbc, Marnie Chesterton, Victoria Gill, Adam Rutherford
Dr. Padi Boyd, Katie Konans, Jacob Pinter
United States
Alex Mccolgan
Sam Harris
Goalhanger
Vanuatu
Shankar Vedantam
Helen Needham, Mark Stephen, Bbc
Scotland, United Kingdom
Dr. Mindy Pelz
The Economist
Emily Kwong, Regina G. Barber, Npr
