Close your eyes and think back to some terms that you heard at a party in the Y2K era. If someone in 2026 genuinely asked, “Do you want to get crunk with that guy wearing bling or is he a scrub?” they’d seem like they were living in the past, right?

It goes down just as well as greeting someone with a “Wassup!” from the 1999 Budweiser commercials, or referring to someone’s hat as “fly.”

Slang terms seem to have a shelf life of a couple of years before they fizzle out, and are a clear line of demarcation between who’s young and cool and who’s not. The interesting thing is that the term “cool” has never really gone out of style. It was used to describe James Dean in Rebel Without a Cause in 1955 and in 2025 to describe singer Charli xcx.

According to sociolinguist Dr. Erica Brozovsky, Ph.D the term “cool” has been used to describe someone who’s incredibly calm for over 500 years. But it really took off in the jazz era, when Black musicians used it to inspire a style and sound. 

“From Anna Lee Chisholm’s ‘Cool Kind Daddy Blues,’ to Miles Davis’ Birth of the Cool, the word was used to describe a certain kind of musicality, but also a type of personality, laid back, competent, and confident,” Brozovsky said. “By the late forties, The New Yorker noted the term’s rising popularity. ‘The bebop people have a language of their own, their expressions of approval include, cool,’” Brozovsky said.

The term has endured for decades, from the definition of cool, Arthur Fonzarelli in the ‘70s, to actor-comedian Eddie Murphy in the ‘80s, to Snoop Dogg in the ‘90s, and Bad Bunny in the modern era. The question remains why “cool ” has stood the test of time while terms such as “swell” or “wicked” have fallen into the cultural dustbin. Brozovsky believes it has to do with a linguistic quirk in which humans tend to repeat metaphors with sensory elements more often than those without.

It makes sense. “Cool” is something you can feel while “swell” is not.

Why is it that ‘cool’ has stuck around?

“A 2015 study tracked the popularity of various words and phrases over time and found that terms that evoke a sensory experience are more likely to persevere than those that don’t. For instance, sharp increase became a more popular way to say sudden increase and a bright future became more common than a promising future,” Brozovsky says.

“In fact, the study found that people were 50% more likely to remember a list of metaphors if they contain sensory words,” she continues. “Perhaps swell with its convoluted origin was just too abstract to compete with the physical sensation of cool, but it seems to me that the history of the word outweighs its semantic appeal.”

In a world where styles in clothing, music, and vocabulary are constantly changing, it’s nice to know that some things cut across the generations. Whether you’re 70 or you’re 12, you know what it means to be cool. You probably don’t agree on who fits the bill, but vibe is forever.

A single door can open up a world of endless possibilities. For homeowners, the front door of their house is a  gateway to financial stability, job security, and better health. Yet for many, that door remains closed. Due to the rising costs of housing, 1 in 3 people around the world wake up without the security of safe, affordable housing. 

Since 1976, Habitat for Humanity has made it their mission to unlock and open the door to opportunity for families everywhere, and their efforts have paid off in a big way. Through their work over the past 50 years, more than 65 million people have gained access to new or improved housing, and the movement continues to gain momentum. Since 2011 alone, Habitat for Humanity has expanded access to affordable housing by a hundredfold. 

A world where everyone has access to a decent home is becoming a reality, but there’s still much to do. As they celebrate 50 years of building, Habitat for Humanity is inviting people of all backgrounds and talents to be part of what comes next through Let’s Open the Door, a global campaign that builds on this momentum and encourages people everywhere to help expand access to safe, affordable housing for those who need it most. Here’s how the foundation to a better world starts with housing, and how everyone can pitch in to make it happen. 

Globally, almost 3 billion people, including 1 in 6 U.S. families, struggle with high costs and other challenges related to housing. A crisis in itself, this also creates larger problems that affect families and communities in unexpected ways. People who lack affordable, stable housing are also more likely to experience financial hardship in other areas of their lives, since a larger share of their income often goes toward rent, utilities, and frequent moves. They are also more likely to experience health problems due to chronic stress or environmental factors, such as mold. Housing insecurity also goes hand-in-hand with unstable employment, since people may need to move further from their jobs or switch jobs altogether to offset the cost of housing. 

Affordable homeownership creates a stable foundation for families to thrive, reducing stress and increasing the likelihood for good health and stable employment. Habitat for Humanity builds and repairs homes with individual families, but it also strengthens entire communities as well. The MicroBuild® Initiative, for example, strengthens communities by increasing access to  loans for low-income families seeking to build or repair their homes. Habitat ReStore locations provide affordable appliances and building materials to local communities, in addition to creating job and volunteer opportunities that support neighborhood growth. 

Everyone can play a part in the fight for housing equity and the pursuit of a better world. Over the past 50 years, Habitat for Humanity has become a leader in global housing thanks to an engaged network of volunteers—but you don’t need to be skilled with a hammer to make a meaningful impact. Building an equitable future means calling on a wide range of people and talents.Here’s how you can get involved in the global housing movement:

Speaking up on social media about the growing housing crisis 

Volunteering on a Habitat for Humanity build in your local community

Travel and build with Habitat in the U.S. or  in one of 60   countries where we work around the globe

Join the Let’s Open the Door movement and, when you donate, you can create your own personalized door 

Shop or donate at your local Habitat ReStore

Every action, big and small, drives a global movement toward a better future. A safe home unlocks opportunity for families and communities alike, but it’s volunteers and other supporters, working together with a shared vision, who can open the door for everyone. 

Visit habitat.org/open-door to learn more and get involved today. 

If you’ve never heard of a tagua nut, you’re not alone. The seed of the South American tagua palm isn’t well-known in the 21st century, but in the early 20th century, it was all the rage. Though edible at certain stages of development, it’s not primarily used as food. Rather, it served as an eco-friendly alternative and precursor to plastic and ivory.

In fact, it was plastic that caused the decline in demand for the tagua nut, also known as “vegetable ivory.” The scientific name for it translates as “plant elephant,” which makes sense considering how similar the solid form of the nut is to ivory from elephant tusks.

In fact, according to clothing expert The Iron Snail, the only real difference in useful qualities between tagua and ivory is density. But even by that measure, they’re pretty close.

So why were so many people in the 1920s wearing tagua? The nut was apparently a great material for making buttons. There were metal and wood buttons, of course, but tagua nut buttons served as the precursor to the now ubiquitous plastic button.

Tagua nut buttons are also called corozo buttons. Though they used to be made out of necessity, today they are a sustainable, eco-friendly, high-quality alternative to plastic. Some people collect vintage and antique tagua buttons, but companies still make them today, largely in South America.

Tagua is also used to make jewelry, as well as small artistic sculptures and musical instrument parts, as it can be carved the same way ivory can.

How is it edible if it’s nearly as hard as ivory, one might wonder? Like a coconut, the tagua nut is liquid inside during the early stages of maturation. At one point, the inside that will later turn white and hard is a clearish jelly that people can eat. Only after it fully matures and hardens in the sun can it be used as a carving material.

Tagua nuts are not the only plant-based ivory out there, either. In fact, Weird Explorer shared three fruits and seeds that can claim the........

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