From a young age, Frank was fascinated by maps and atlases, and the stories they contained. Finding his birthplace on the map in the endpapers of Tolkien's Lord of the Rings only increased his interest in the mystery and message of maps.
While pursuing a career in journalism, Frank started a blog called Strange Maps, as a repository for the weird and wonderful cartography he found hidden in books, posing as everyday objects and (of course) floating around the Internet.
"Each map tells a story, but the stories told by your standard atlas for school or reference are limited and literal: they show only the most practical side of the world, its geography and its political divisions. Strange Maps aims to collect and comment on maps that do everything but that - maps that show the world from a different angle".
A remit that wide allows for a steady, varied diet of maps: Frank has been writing about strange maps since 2006, published a book on the subject in 2009 and joined Big Think in 2010. Readers send in new material daily, and he keeps bumping in to cartography that is delightfully obscure, amazingly beautiful, shockingly partisan, and more.
All big cities have rats, but Paris seems to have a more serious rodent problem than most.
Soccer is not a matter of life and death. It's much more important than that. And the FIFA World Cup even more so.
The world's newest land, created by Hawaii's volcanic outburst, already has an owner.
This is what the world will look like, 250 million years from now
In most countries around the world, some jobs are by law reserved for men only and forbidden for women.
Each year, lightning kills 24,000 people around the world. These maps show which regions get hit more than others.
Could social graphing be a way to find the 'Holy Grail' of successful movie writing?
West Virginia and Mississippi are at the bottom of the educational attainment table and Massachusetts is the state with the highest share of Bachelor's degree holders - beaten only by the District of Columbia
For urban exploration with an ironic twist, go 'bag' all 32 London Borough Tops
Just how equal in size are the populations of Europe and North America?