When this pair of information designers agreed to become transatlantic pen pals, they chose an unusual method for communicating. http://on.natgeo.com/2o4df5x pic.twitter.com/wrbrhEjisp

When this pair of information designers agreed to become transatlantic pen pals, they chose an unusual method for communicating. http://on.natgeo.com/2o4df5x  pic.twitter.com/wrbrhEjisp

https://twitter.com/NatGeoTravel/status/964303407992500224