This is how Marco Grob did it:
Read up on the fascinating details here: "Behind the Cover: June 2013".
- MORE FROM THE NATIONAL GEOGRAPHIC:
Photography buffs will go nuts when they read these tips on the NatGeo website
How to get people to read — and appreciate — your Facebook posts
PLUS: Check out the National Geographic style guide, which comes highly recommended by Mark Nichol, editor of the Daily Writing Tips blog: "This free online resource from the National Geographic Society doesn’t show up high in search rankings, but it’s an excellent resource. (And, seriously, have you ever seen a clumsy sentence, a grammatical error, or even a typo in National Geographic?) Unusually terse but clear entries are organised alphabetically, and the site includes a directory of new and altered entries and, especially helpful, one of terms and rules that contradict other authoritative resources or are exceptions to the norm."