If you could be one age for the rest of your life, what would it be?

Would you choose to be nine years old, spending your days playing with friends and practicing your times tables?

Or would you choose your early 20s, when time feels endless and the world is your oyster with friends, travel, pubs, and clubs?

Western culture idealizes youth, so it may come as a surprise to learn that in a recent poll asking this question, the most popular answer wasn’t 9 or 23, but 36.

Yet as a developmental psychologist, I thought that response made a lot of sense.

adulthood, turning 36, developmental psychology, life satisfaction, emotional maturity, career crunch, parenting, aging, 30s life, peak happiness
36 is the magic number. Canva

For the last four years, I’ve been studying people’s experiences in their 30s and early 40s, and my research has led me to believe that this stage of life, while full of challenges, is much more rewarding than most might think.

The career and care crunch

When I was a researcher in my late 30s, I realized that no one was doing research on people in their 30s and early 40s, which puzzled me. So much often happens during this time: Buying homes, getting married or getting divorced; building careers, changing careers, having children or choosing not to have children.

self-confidence, mental health, midlife, adult friendships, work-life balance, life stages
According to one respondendant things Canva

To study something, it helps to name it. So my colleagues and I named the period from ages 30 to 45 “established adulthood” and then set out to try to understand it better. While we are still collecting data, we have interviewed over 100 people in this age cohort and collected survey data from more than 600 additional people.

We went into this large-scale project expecting to find that established adults were happy but struggling. We thought there would be rewards during this period of life, perhaps being settled in career, family, and friendships, or peaking physically and cognitively, but also some significant challenges.

The main challenge we anticipated was what we called “the career and care crunch.”

This refers to the collision of workplace demands and the demands of caring for others that occurs in one’s 30s and early 40s. Trying to climb a ladder in one’s chosen career while also being increasingly expected to care for kids, tend to the needs of partners and perhaps care for aging parents.

Yet when we started to look at our data, what we found surprised us.

Yes, people were feeling overwhelmed and talked about having too much to do in too little time. But they also talked about feeling profoundly satisfied. All of these things that were bringing them stress were also bringing them joy.

For example, Yuying, 44, said, “Even though there are complicated points of this time period, I feel very solidly happy in this space right now.” Nina, 39, simply described herself as being “wildly happy.” (The names used in this piece are pseudonyms, as required by research protocol.)

When we took an even closer look at our data, it started to become clear why people might wish to remain age 36 over any other age. People talked about being in the prime of their lives and feeling at their peak. After years of working to develop careers and relationships, people reported feeling as though they had finally arrived.

Mark, 36, shared that, at least for him, “things feel more in place.” “I’ve put together a machine that’s finally got all the parts it needs,” he said.

A sigh of relief after the tumultuous 20s

As well as feeling as though they had accumulated the careers, relationships and general life skills they had been working toward since their 20s, people also said they had greater self-confidence and understood themselves better.

Jodie, 36, appreciated the wisdom she had gained as she reflected on life beyond her 20s:

“Now you’ve got a solid decade of life experience. And what you discover about yourself in your 20s isn’t necessarily that what you wanted was wrong. It’s just you have the opportunity to figure out what you don’t want and what’s not going to work for you. So you go into your 30s, and you don’t waste a bunch of time going on half dozen dates with somebody that’s probably not really going to work out, because you’ve dated before and you have that confidence and that self-assuredness to be like, ‘Hey, thanks but no thanks.’ Your friend circle becomes a lot closer because you weed out the people that you just don’t need in your life that bring drama.

Most established adults we interviewed seemed to recognize that they were happier in their 30s than they were in their 20s, and this impacted how they thought about some of the signs of physical aging that they were starting to encounter. For example, Lisa, 37, said, “If I could go back physically but I had to also go back emotionally and mentally no way. I would take flabby skin lines every day.”

Not ideal for everyone

Our research should be viewed with some caveats.

The interviews were primarily conducted with middle-class North Americans, and many of the participants were white. For those who are working class, or for those who have had to deal with decades of systemic racism, established adulthood may not be so rosy.

It is also worth noting that the career and care crunch has been exacerbated, especially for women, by the COVID-19 pandemic. For this reason, the pandemic may be leading to a decrease in life satisfaction, especially for established adults who are parents trying to navigate full-time careers and full-time child care.

[You’re smart and curious about the world. So are The Conversation’s authors and editors. You can get our highlights each weekend.]

At the same time, that people think of their 30s and not their 20s or their teens as the sweet spot in their lives to which they’d like to return suggests that this is a period of life that we should pay more attention to.

And this is slowly happening. Along with my own work is an excellent book recently written by Kayleen Shaefer, “But You’re Still So Young,” that explores people navigating their 30s. In her book she tells stories of changing career paths, navigating relationships and dealing with fertility.

My colleagues and I hope that our work and Shaefer’s book are just the beginning. A better understanding of the challenges and rewards of established adulthood will give society more tools to support people during that period, ensuring that this golden age provides not only memories that we will fondly look back upon but also a solid foundation for the rest of our lives.

Clare Mehta is an Associate Professor of Psychology, Emmanuel College. This article originally appeared on The Conversation. You can read it here.

This article originally appeared last year.

  • Earth’s missing continent rediscovered 375 years after sailors first set foot there
    Though mostly submerged now, Zealandia is a real place.
    ,

    Earth’s missing continent rediscovered 375 years after sailors first set foot there

    Long overlooked and mostly underwater, Zealandia is rewriting what we know about Earth’s continents.

    Earth still holds remarkable secrets beneath its surface—and sometimes beneath its oceans. In 2017, scientists confirmed the existence of a hidden continent beneath the South Pacific. Now known as Zealandia, this mostly submerged landmass was found hiding in plain sight and has since been dubbed “the eighth continent.” A study published in Tectonics helped solidify its status, offering a new perspective on Earth’s ever-evolving geography.

    The long search that began in the 1600s

    Although the researchers discovered this new continent in 2017, the hunt began almost 400 years ago. In 1642, Dutch captain Abel Tasman (seen in the above portrait), serving the East India Company, was ordered to explore a Southern Continent. On August 14, 1642, Tasman departed from Batavia with two ships sailing west to Mauritius in the Indian Ocean, according to Princeton University Library.

    zealandia, logbook, lost continent
    A detailed view of the logbook of navigator Abel Tasman (Dutch East India Company) from 1642 Dean Mouhtaropoulos/Getty Images

    Tasman named the location “Moordenaers (Murderers) Bay,” and sailed home, never to return to this land, although he did believe that he had discovered a great new continent.

    Naming and defining Zealandia

    It was nearly 375 years after Tasman’s voyage that geologists stumbled upon this mainland. They announced the discovery by naming it “Zealandia,” based on the suggestion of American geophysicist Bruce Luyendyk who described this region in 1995. Zealandia is translated to “Te Riu-a-Māui” in the Māori language.

    Zealandia lies mostly submerged off the east coast of Australia Public Domain

    In a paper, researchers from GNS Science of New Zealand documented that they had to dredge rock samples from the Fairway Ridge to the Coral Sea to analyze the rock geochemically and understand the underwater makeup of Zealandia. Led by Nick Mortimer, they scanned the northern two-thirds of the submerged area, where they unearthed pebbly and cobbley sandstone, fine-grain sandstone, mudstone, bioclastic limestone, and basaltic lava from a variety of periods as concluded by their radiocarbon dating.

    Ancient rocks with a story to tell

    The rocks and stones were found to be roughly 95 million years old, from the Late Cretaceous period. The granite and volcanic pebbles were estimated to be 130 million years old, the Early Cretaceous period. The basalts however were newer, probably about 40 million years old, and from the Eocene period. “It is kind of cool,” said Mortimer, per BBC. Andy Tulloch, a geologist at the New Zealand Crown Research Institute GNS Science, who was part of the research team, added, “This is an example of how something very obvious can take a while to uncover.”

    Mostly submerged, yet massive

    Although Zealandia is a vast continent that spans an expanse stretched for 4.9 million square kilometers, around six times the size of Madagascar, most of it is submerged under the South Pacific Ocean. Only the area at the Ball’s Pyramid on Lord Howe Island rises above the water’s veil. It is the smallest, thinnest, and youngest of all known continents.

    Usually, the continental crust is about 40 kilometers deep, thicker than the oceanic crust which is about 10 kilometers. The researchers proposed that since Zealandia ended up stretched too much, its crust became thinner, around 20 kilometers, and finally disappeared under the sea. With 95 percent of its territory submerged beneath the ocean’s depths, Zealandia prowls on planet Earth as a lair possessing an enigmatic charm of mysterious historical elements and ancient stories.

    This article originally appeared last year.

    This article originally appeared 1 year ago. It has been updated.

  • ‘Star Trek’ and NASA have intertwined legacies – the show championed diversity and inspired generations of real space scientists
    Photo credit: NASA – Gene Roddenberry, second from right, and Star Trek cast members visit the Space Shuttle Enterprise in 1976 with NASA Administrator James C. Fletcher, left. NASA

    “Star Trek” began as a television series but grew into a cultural phenomenon.

    When it premiered in 1966, no one could have predicted that it would lead to more than a dozen spinoff shows, more than a dozen movies and one of the most enduring fandoms in popular culture.

    “Star Trek” is also unusual for its close connections to NASA, both in its storylines and in the real world. Decades of “Star Trek” adventures have ignited a love of spaceflight across generations, inspiring many who now work as space professionals.

    I’m a cultural anthropologist who studies why people work in space exploration. I’ve interviewed astronomers, engineers, flight surgeons and astronauts. Although I focus more on science fact than science fiction, I’ve noticed in my interviews how much the two threads intertwine.

    Because of this, I found myself at a “Star Trek” convention in early August 2026, just ahead of the show’s 60th anniversary on Sept. 8. The convention participants included people of widely different ages, appearances and identities. I was struck by just how much those gathered reflected the series’ values.

    When NASA met Star Trek

    In the original series, the show’s creator, Gene Roddenberry, came up with a philosophy held by the Vulcan people. He called it IDIC: infinite diversity in infinite combinations. It suggests that an ideal society is made up of many different types, all working together.

    It represented Roddenberry’s rejection of conformity. It also explained why the Enterprise crew included a Russian alongside Americans, and Black, Japanese and female characters all in positions of responsibility and authority. While many ordinary viewers absorbed “Star Trek’s” lessons of camaraderie and acceptance, those involved in real space exploration also took notice.

    A black-and-white photo of four characters wearing Starfleet uniforms, including two white men, an Asian man and a Black woman.
    The cast of ‘Star Trek: The Original Series’ included a diverse crew of characters. Walters Art Museum

    Roddenberry established relationships with NASA personnel in the early days of his series. NASA provided photographs of planetary bodies and advice about the realities of spaceflight, as well as stock footage and access to certain NASA facilities.

    Leonard Nimoy, who played the popular character Mr. Spock, was even brought to the National Space Club’s Goddard Memorial Dinner in 1967 as a special guest. Then-Vice President Hubert Humphrey gave the keynote speech. Afterward, though, it was Nimoy, not Humphrey, who found himself surrounded by the club’s members, including NASA employees, aerospace engineers, members of the military and government officials, all eager to meet the actor portraying the starship Enterprise’s first officer.

    The relationship between NASA and “Star Trek” benefited the show by legitimizing the series. It also helped NASA by publicizing its work and depicting a positive future where its efforts to land on the Moon would eventually lead to visits to distant worlds – and amazing scientific advances like the show’s transporter and warp drive.

    The connection between the space show and space agency was reflected in NASA’s decision to name its first space shuttle Enterprise, after some encouragement from the “Star Trek” fan community.

    Inspiring astronauts

    In 1977, actress Nichelle Nichols, who portrayed communications officer Uhura, was hired to recruit for NASA. The space agency had expanded its pool of astronauts to include scientists and other “mission specialists.” For the first time, an astronaut no longer needed to be a pilot to participate in a space mission.

    NASA selected its first Black astronaut candidates and its first female astronaut candidates in 1978. While this move toward inclusivity may not have been directly influenced by infinite diversity in infinite combinations, it was compatible with it. “Star Trek” inspired many of NASA’s future employees. In interviews for my book “The Ultraview Effect,” a quarter of the space professionals I spoke with mentioned “Star Trek” as an influence.

    A woman wearing a blue jumpsuit sitting in the pilot's chair in a space shuttle cockpit simulator
    Nichelle Nichols sits in the space shuttle simulator at the Johnson Space Center in March 1977. NASA

    An Apollo astronaut I interviewed, for instance, said he believed humans would eventually “be able to go anywhere in the universe, just like ‘Star Trek.’”

    A young engineer who had grown up in the 1990s told me his motivation came from the “opening line of ‘Star Trek’… to explore strange new worlds.”

    A space shuttle mission specialist emphasized Roddenberry’s decision to make the starship crew multicultural, explaining: “Today I look at the diversity of it … he was setting the stage back when it wasn’t acceptable [in order] to be acceptable!”

    A changing future

    That influence has accompanied a changing astronaut corps.

    Both the 2025 astronaut class, which for the first time included more women than men, and the crew of Artemis II, which sent the first woman, first Black astronaut and first Canadian on a lunar mission, resemble the future that “Star Trek” imagined.

    The “Star Trek” fans at the convention I attended were even more diverse. It was clear to me that Roddenberry’s “infinite diversity in infinite combinations” isn’t just a concept from the series, but something that has become a defining value of contemporary Trek fandom.

    A photo of space, with some bright spots representing nebulae, including a bright spot that looks like the disc-shaped hull of the starship Enterprise from Star Trek
    NASA’s Spitzer Space Telescope captured a region of the galaxy that looks a little like the USS Enterprise, which NASA highlighted in a news release in 2016. NASA/JPL-Caltech

    One such fan, Bjo Trimble, holds special status. She is credited with “saving ‘Star Trek’” when the series was almost canceled in 1968 after two seasons. Wearing a rainbow “IDIC” pin, she signed autographs at the SyFy Sistas booth, where T-shirts featuring Black “Star Trek” icons such as Uhura and Benjamin Sisko were on display.

    However, with the Trump administration’s recent orders to dismantle all of NASA’s diversity, equity, inclusion and accessibility programs and policies, institutional support for “Star Trek’s” vision of acceptance and inclusivity, which flourishes in its fan base, is being undone. This rollback occurred just as NASA’s crews were reaching new milestones in representing the diverse future that “Star Trek” has encouraged for decades.

    Sixty years later, some of the diverse future that “Star Trek” imagined has become part of everyday spaceflight. Other parts of that ideal remain unfinished.

    This article originally appeared on The Conversation. You can read it here.

  • Spanish zoo study suggests that giraffes can do basic math
    Photo credit: Canva – A study is showing giraffes could be using math.
    ,

    Spanish zoo study suggests that giraffes can do basic math

    These hoofed mammals can understand addition.

    The results of an experiment done in a Barcelona zoo suggest that giraffes are capable of doing basic mathematics.

    A group of researchers from the University of Leipzig, the Max Planck Institute for Evolutionary Anthropology, and the University of Barcelona published their study observing four giraffes at the Barcelona Zoo. The experiment involved the giraffes observing containers that had different amounts of carrot pieces inside.

    How did this experiment work?

    The researchers showed each giraffe the two yellow containers and the amount of carrots within each one. After a few seconds, they closed the containers, keeping the carrots out of sight. They then showed each giraffe a green container which had extra carrots inside. Researchers took the carrot pieces from the green container and placed them into one of the closed yellow containers. They then let each giraffe independently choose which of the two closed yellow containers they preferred, without them seeing the total number of carrot pieces within each box.

    The results found the giraffes would choose the container that had the most carrot pieces around 68% of the time. This suggests to the scientists that the giraffes were mentally adding the carrots up in each container before making their choice. After all, there have been past studies suggesting that other hoofed mammals, such as horses, had similar capability of basic quantity tracking.

    The researchers did the experiment again. Only this time they subtracted the amount of carrots in each container. The giraffes were mostly unsuccessful at finding the container with the most pieces. So while giraffes showed signs of knowing addition, they don’t quite process all forms of arithmetic.

    Math = Survival

    Scientists believe that this understanding of addition helped giraffes survive in the wild. They cite that acacia trees, a dietary staple for wild giraffes, can be spread far apart in Africa. Being able to figure out which area has the most trees and the most leaves can help them decide where to graze next.

    Giraffes also live in flexible groups that often change in size. One grouping can mix in with another group and then branch off or away. This means that the giraffes often have to keep track of those currently within their group and surroundings to survive.

    Can other animals do math?

    Giraffes are just the latest animal species known to have some form of mathematical skill. Chimpanzees displayed similar abilities to count as giraffes in a similar experiment that involved them picking the bowl with the most chocolate pieces rather than carrots. Chickens and black bears also showed aptitude in quantity tracking, too. 

    Scientists theorize that most of the animals that can do this basic math through evolutionary survival. After all, the animal that can deduce where more food is tends to live longer.

    One species that displays remarkable mathematical ability are Tunisian desert ants. An observation of their navigational skills of finding their way to food and back to their nest suggests they use the sun as a compass in combination with mentally keeping track of the number of steps they take in a three-dimensional space. In short, these desert ants possess basic geometric and trigonometry skills.

    While you wouldn’t want wild animals to calculate your taxes, it’s interesting to see how rudimentary math is a language that goes beyond species.

Explore More Exploration Stories

Science

‘Star Trek’ and NASA have intertwined legacies – the show championed diversity and inspired generations of real space scientists

Science

Spanish zoo study suggests that giraffes can do basic math

Science

A bonobo’s make-believe tea party has scientists rethinking whether imagination belongs only to humans

Science

Humans nearly vanished 800,000 years ago, revealing a quiet truth: most family lines disappear