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Concrete Improvements

Andrew Price
04.04.09

Remember when that bridge collapsed near downtown Minneapolis in 2007? They've replaced it with this gorgeous new structure, The St. Anthony Falls Bridge. The new bridge employs some of the most cutting-edge technology in concrete mixing. The New York Times explains:"...the components are made from different concrete mixes, the recipes tweaked, as a chef would, for specific strength and durability requirements and to reduce the impact on the environment. One mix, incorporated in wavy sculptures at both ends of the bridge, is designed to stay gleaming white by scrubbing stain-causing pollutants from the air. The project, built for more than $230 million and finished in September, three months ahead of schedule, ‘might have been the most demanding concrete job in the United States in 2008,' said Richard D. Stehly, principal of American Engineering Testing, a Minneapolis firm that was involved in the project."Still, about a ton of CO2 is emitted for every ton of cement produced. But, precisely because cement production is such a big source of carbon emissions, these marginal improvements make a real difference. And there's even talk of being able to use carbon-negative cement at some point. Roll out the stimulus funds!Photo from Flickr user Mulad, licensed under Creative Commons.
Articles

Central Park is finally getting a statue of women and it's about time

Photo by Josh Couch on Unsplash

Christopher Columbus, Alexander Hamilton, William Shakespeare, and Sir Walter Scott are getting company. Statues of the famous men are scattered across Central Park in New York City, along with 19 others. But they'll finally be joined by a few women.

Susan B. Anthony, Elizabeth Cady Stanton, and Sojourner Truth are the subjects of a new statue that will be on display along The Mall, a walkway that runs through the park from 66th to 72nd street. It will be dedicated in August of next year, which is fittingly the 100-year anniversary of the 19th Amendment that granted women the right to vote.

Currently, just 3% of statues in New York City are dedicated to women. Out of 150 statues of historical figures across the city, only five statues are of historical women, including Joan of Arc, Golda Meir, Gertrude Stein, Eleanor Roosevelt, and Harriet Tubman.

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If you think all hope is lost for wildlife, you're wrong

It's easy to become calloused to everyday headlines with messages like, "the world is ending" and "everything is going extinct." They're so prevalent, in fact, that the severity of these statements has completely diminished to the point that no one pays them any attention. This environmental negativity (coined "eco-phobia") has led us to believe that all hope is lost for wildlife. But luckily, that isn't the case.

Historically, we have waited until something is near the complete point of collapse, then fought and clawed to bring the species numbers back up. But oftentimes we wait so long that it's too late. Creatures vanish from the Earth altogether. They go extinct. And even though I don't think for a single second that we should downplay the severity of extinction, if we can flip this on its head and show that every once in a while a species we have given up on is actually still out there, hanging on by a thread against all odds, that is a story that deserves to be told. A tragic story of loss becomes one about an animal that deserves a shot at preservation and a message of hope the world deserves to hear.

As a wildlife biologist and tracker who has dedicated his life to the pursuit of animals I believe have been wrongfully deemed extinct, I spend most of my time in super remote corners of the Earth, hoping to find some shred of evidence that these incredible creatures are still out there. And to be frank, I'm pretty damn good at it!

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The Planet

A 'rude' encounter between Susan Collins and one voter might just end the Republican's career

For more than 20 years. Sen. Susan Collins (R-ME) has served the citizens of Maine in the U.S. Senate. For most of that time, she has enjoyed a hard-fought reputation as a moderate Republican who methodically builds bridges and consensus in an era of political polarization. To millions of political observers, she exemplified the best of post-partisan leadership, finding a "third way" through the static of ideological tribalism.

However, all of that has changed since the election of Donald Trump in 2016. Voters in Maine, particularly those who lean left, have run out of patience with Collins and her seeming refusal to stand up to Trump. That frustration peaked with the nomination of Brett Kavanaugh to the Supreme Court.

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Politics

Human inequality goes all the way back to the Bronze Age, study finds

NHM Vienna/Hans Reschreiter

Wealth inequality has been a hot topic of discussion as of late, but it's something that's occurred all throughout history. Class structure is a complicated issue, especially when you consider that haves and have nots have been in existence for over 4,000 years.

A study published in Science took a look at over 100 late Neolithic and early Bronze Age skeletons found in a burial site in southern Germany. The study "shed light on the complexity of social status, inheritance rules, and mobility during the Bronze Age." Partly by looking at their teeth and the artifacts they were buried with, researchers were able to discover that wealth inequality existed almost 4,000 years ago. "Our results reveal that individual households lasting several generations consisted of a high-status core family and unrelated low-status individuals, a social organization accompanied by patrilocality and female exogamy, and the stability of this system over 700 years," the study said.

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Culture

Alexandria Ocasio-Cortez jusst endorsed Bernie Sanders for president

via Truthout.org / Flickr and Dimitri Rodriguez / Flickr

Bernie Sanders' presidential campaign looks to be getting a huge big shot in the arm after it's faced some difficulties over the past few weeks.

Alexandria Ocasio-Cortez, a leading voice in the Democratic parties progressive, Democratic Socialist wing, is expected to endorse Sanders' campaign at the "Bernie's Back" rally in Queens, New York this Saturday.

Fellow member of "the Squad," Ilhan Omar, endorsed him on Wednesday.

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