The Batman and the Bridge Builder
99% Invisible23 Feb 2021

The Batman and the Bridge Builder

Mark Bloschock is an engineer from Texas, and in the late 1970s he got a job with the Texas Department of Transportation renovating the Congress Avenue Bridge. The bridge was a simple concrete arch bridge that spans Lady Bird Lake in downtown Austin. It needed to be rebuilt with more contemporary beams called “box beams.” The box beams sit below the road’s surface, and they needed to be spaced a certain distance apart. Bloschock and the other engineers decided that the gap should be somewhere between ¾ of an inch and an inch and a half, which didn’t seem like a particularly meaningful decision… until the bats moved in.

A tale of bats and bridges and how the built environment and the natural environment don’t need to be at odds with one another.

The Batman and the Bridge Builder

Plus, we talk with Simon Doble, CEO of Solar Buddy. Light access (both day and night) is a basic need many people take for granted. SolarBuddy is an Australian charity uniting a global community with a big dream to gift six million solar lights to children living in energy poverty by 2030, to help them to study after dusk and improve their education outcomes.

99% Invisible’s Impact Design coverage is supported by Autodesk. The Autodesk Foundation supports the design and creation of innovative solutions to the world’s most pressing social and environmental challenges. Learn more about these efforts on Autodesk’s Redshift, which tells stories about the future of making across architecture, engineering, infrastructure and manufacturing.

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The Eponymist

The Eponymist

Eponym (noun):  A person after whom a discovery, invention, place, etc., is named or thought to be named; a name or noun formed after a person. An eponym, almost by definition, has some kind of story behind it — some reason it … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

1 Feb 201727min

The Revolutionary Post

The Revolutionary Post

Winifred Gallagher, author of How the Post Office Created America: A History, argues that the post office is not simply an inexpensive way to send a letter. The service was designed to unite a bunch of disparate towns and people … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

24 Jan 201717min

Tom Swift and His Electric Rifle

Tom Swift and His Electric Rifle

On January 3, 1979, two officers from the Los Angeles Police Department went to the home of Eulia May Love, a 39-year-old African-American mother. The police were there because of a dispute over an unpaid gas bill. The officers approached … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

18 Jan 201719min

Mini-Stories: Volume 2

Mini-Stories: Volume 2

Part 2 where host Roman Mars talks to the 99pi producers about their favorite “Mini-Stories.” These are little anecdotes or seeds of a story about design and architecture that can’t quite stretch into a full episode, but we love them … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

10 Jan 201729min

Mini-Stories: Volume 1

Mini-Stories: Volume 1

Host Roman Mars talks to the 99pi producers about their favorite “Mini-Stories.” These are little anecdotes or seeds of a story about design and architecture that can’t quite stretch into a full episode, but the staff loves them anyway. Roman talks … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

20 Dec 201627min

Plat of Zion

Plat of Zion

The urban grid of Salt Lake City, Utah is designed to tell you exactly where you are in relation to Temple Square, one of the holiest sites for Mormons. Addresses can read like sets of coordinates. “300 South 2100 East,” … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

14 Dec 201617min

Guano Island

Guano Island

In 2014, President Obama expanded the Pacific Remote Islands Marine National Monument, making it the largest marine preserve in the world at the time. The expansion closed 490,000 square miles of largely undisturbed ocean to commercial fishing and underwater mining. … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

6 Dec 201618min

NBC Chimes

NBC Chimes

The NBC chimes may be the most famous sound in broadcasting. Originating in the 1920s, the three key sequential notes are familiar to generations of radio listeners and television watchers. Many companies have tried to trademark sounds but only around … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

29 Nov 201613min

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