The 99% Invisible City

The 99% Invisible City Guest: Roman Mars, host and creator of "99% Invisible" podcast and co-author of "The 99% Invisible City: A Field Guide to the Hidden World of Everyday Design" The urban environment is replete with inconspicuous design choices, stories, and secrets. Roman Mars has spent a decade exploring them on his wildly popular podcast, "99% Invisible," and has now released a book guide to as many as can fit into 375 pages. We find out why Mars once thought he was "unsuitable for public radio," and we hear some of his favorite stories, including why he loves stairs to nowhere that are "useless, but maintained." Find us on Facebook or Instagram for a chance to win your copy of the book.  The Wrong Foot Guest: Michael Dennis, NOAA and NGS geodesist For more than a century, America has been using two different measurements for the foot, but we’re finally dropping one, and the US will become 28.3 feet wider. How we got into this situation in the first place.