GOOD

The Wildly Fascinating Reason All Barns Are Painted Red

No, not all farmers love red

Image via Public Domain Images

Even today, with the limitless paint colors at our disposal, you’ll likely see mostly red barns while driving down a country road. The reason for this, remarkably, has to do with the byproducts of dying stars.


As Google employee Yonatan Zunger explained on his Google+ profile, barns have historically been painted red because red paint is the cheapest. But to really dig deep and get to the bottom of why that is, you have to “go all the way to the formation of matter itself,” he writes. The foundation of red paint relies on iron oxide, an organic compound that reflects reddish-orange light while absorbing yellow, green, and blue light waves. On our planet, there’s tons of it, and we have the natural process of nuclear fusion to thank.

Zunger lays out all the details his blog post, explaining,

“The only thing holding the star up was the energy of the fusion reactions, so as power levels go down, the star starts to shrink. And as it shrinks, the pressure goes up, and the temperature goes up, until suddenly it hits a temperature where a new reaction can get started. These new reactions give it a big burst of energy, but start to form heavier elements still, and so the cycle gradually repeats, with the star reacting further and further up the periodic table, producing more and more heavy elements as it goes. Until it hits 56. At that point, the reactions simply stop producing energy at all; the star shuts down and collapses without stopping…

So it’s because of the details of nuclear fusion—the particular size at which nuclei stop producing energy—that iron is the most common element heavier than neon. And as we saw before, you have to be a d-block element to make a decent pigment, which means that iron is going to be, by far, the most plentiful pigment for any species which lives on a star that isn’t about to blow up. And it’s going to bond to oxygen, the most plentiful thing around in planetary crusts for it to bond to (only hydrogen and helium are more common, and they tend to evaporate), to form iron oxides: those rich, red ochres that we mix with oils to form a cheap, stable, red paint.”

So the next time you’re driving through the country or walking past a bold accent wall, remember that it took a massive astronomical event to get there.

Articles

McDonalds sells a lot of coffee. Over a billion cups a year, to be exact. All that coffee leads to a lot of productive mornings, but it also leads to a lot of waste. Each year, millions of pounds of coffee chaff (the skin of the coffee beans that comes off during roasting) ends up getting turned into mulch. Some coffee chaff just gets burned, leading to an increase in CO2.

Now, that chaff is going to get turned into car parts. Ford is incorporating coffee chaff from McDonalds coffee into the headlamps of some cars. Ford has been using plastic and talc to make its headlamps, but this new process will reduce the reliance on talc, a non-renewable mineral. The chaff is heated to high temperatures under low oxygen and mixed with plastic and other additives. The bioplastic can then be formed into shapes.

Keep Reading Show less

For over 20 years, our country has perceived itself as more divided than united, and it's not getting better. Right after the 2016 election, a poll conducted by Gallup found that 77% of Americans felt the country was divided on the most important values, a record high.

The percentage of Americans who agree that we disagree got higher. During the 2018 mid-term elections, a poll conducted by NBC News/Wall Street Journal found that 80% of Americans felt the nation was "mainly" or "totally" divided.

We head into the 2020 presidential election more divided than ever. A new poll from USA Today found that nine out of ten respondents felt it was important to do something about the conflict in our country. We can't keep on living like this forever.

Keep Reading Show less
via Honor Africans / Twitter

The problem with American Sign Language (ASL) is that over 500,000 people in the U.S. use it, but the country has over 330 million people.

So for those with hearing loss, the chances of coming into contact with someone who uses the language are rare. Especially outside of the deaf community.

Keep Reading Show less