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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Show of Force

Show of Force

During World War II, a massive recruitment effort targeted students from the top art schools across the country. These young designers, artists, and makers were being asked to help execute a wild idea that came out of one the nation’s most conservative organizations: the United … 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.

22 Apr 201519min

Perfect Security

Perfect Security

The pursuit of lock picking is as old as the lock, which is itself as old as civilization. But in the entire history of the world, there was only one brief moment, lasting about 70 years, where you could put … 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.

15 Apr 201514min

The Calendar

The Calendar

A month is hardly a unit of measurement. It can start on any day of the week and last anywhere from 28 to 31 days. Sometimes a month is four weeks long, sometimes five, sometimes six. You have to buy … 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.

8 Apr 201516min

Sandhogs

Sandhogs

Eighty years ago, New York City needed another tunnel under the Hudson River. The Holland Tunnel and the George Washington Bridge could no longer handle the mounting traffic between New Jersey and Manhattan. Thus began construction of the Lincoln Tunnel. But this is not a … 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.

31 Mars 201524min

The Colour of Money (R)

The Colour of Money (R)

United States paper currency is so ubiquitous that to really look at its graphic design with fresh eyes requires some deliberate and focused attention. Pull a greenback out from your wallet (or look at a picture online) and really take … 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.

25 Mars 201521min

Devil’s Rope

Devil’s Rope

In the mid 1800s, not many (non-native) Americans had ever been west of the Mississippi. When Frederick Law Olmstead visited the west in the 1850s, he remarked that the plains looked like a sea of grasses that moved  “in swells after … 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 Mars 201520min

Coin Check

Coin Check

The United States Military is not known for being touchy-feely. There’s not much hugging or head-patting, and superiors don’t always have the authority to offer a serviceman a raise or promotion. When a member of the Army, Navy, Air Force, Marine Corps, or Coast … 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.

11 Mars 201515min

Palm Reading

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Reports of palm theft have appeared in LA, San Diego, and Texas; palm rustling also gets a mention in Susan Orlean’s The Orchid Thief. To understand why someone would want to steal a palm tree, we need to understand their value—which has a lot to do … 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.

4 Mars 201513min

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