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A safe, stable home can change lives for the better. Here’s how Habitat for Humanity wants to make that possible for everyone.
Better health, better jobs, and a brighter future all start with access to a safe, affordable home.
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.

Volunteers raise a wall for the framework of a new home during the first day of building at Habitat for Humanity’s 2025 Carter Work Project. 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.

Marsha and her son pose for a photo while building their future home with Southern Crescent Habitat for Humanity in Georgia. 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.
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Women who give birth experience a ‘second puberty’ well before perimenopause
The process can take up to two years to complete.
Puberty is a beast, one that most people try not to remember until they’re standing face to face with their own child and their wildly fluctuating hormones. Unfortunately, for those born with female reproductive organs, adolescent puberty is only the first puberty they will experience.
Many people think “second puberty” refers to the symptoms of perimenopause, which is also the result of fluctuating hormones. Perimenopause comes on a little more gradually than puberty. While the smells, mood swings, and raging hormones might feel familiar, those symptoms usually appear years after hormones begin to decline.

A pregnant woman with her shirt open. Photo credit: Canva There was even a recent moment in Internet history where young women were calling their mid-20s “second puberty.” This was due to them noticing a positive change in appearance that solidified their mature features. Many referred to it as a “glow-up,” focusing on the positive effects of coming out on the other end of puberty. While that’s endearing, puberty is due to an influx of increased hormone levels, which alter the way the world perceives you and how you perceive the world.
Women who have given birth, or will in the future, experience more of a true “second puberty.” This occurs after the birth of their first child, when the mother’s system is flooded with a hormonal shift that literally alters her brain. The “second puberty” birthing people experience is actually called Matrescence, a term meaning the process of becoming a mother coined by anthropologist Dana Raphael.

A woman holds a newborn baby. Photo credit: Canva According to the scientific journal Trends in Cognitive Sciences:
“The hormonal fluctuations of pregnancy, birth, and lactation initiate rapid and extreme physiological transformations that are unparalleled across the lifespan. These biological changes are accompanied by a dynamic restructuring of the physical, emotional, and social environment. In concert with these adaptations, the maternal brain undergoes significant structural and functional neuroplasticity as well as cognitive adaptations across the peripartum period. The brain is transformed, in preparation for and in response to, a developing child.”
Every person charged with caring for an infant undergoes beneficial cognitive changes. Oxytocin is released in the caregiver’s brain regardless of sex or gender, whether the child is related biologically, through adoption, or fostering. Think of it as nature’s way of trying to encourage the survival of the species.

A woman smiles while holding a newborn baby. Photo credit: Canva Current studies show that Matrescence is unique to the birthing person, causing the brain to do more than make cognitive changes. When someone experiences this “second puberty,” the sudden hormonal shifts create structural changes to the brain. A study published by Human Brain Mapping found that adolescent girls and adult first-time mothers had the same monthly measurement of gray matter loss.
“In both cases, these reductions were accompanied by decreases in cortical thickness, surface area, local gyrification index, sulcal depth, and sulcal length, as well as increases in sulcal width,” the authors of the 2019 study explained. “In fact, the changes associated with pregnancy did not differ from those that characterize the transition during adolescence in any of these measures.”

A woman looks down at a newborn baby. Photo credit: Canva According to studies, the reduction in gray matter caused by Matrescence lasts up to two years postpartum. While the infamous “mommy brain” caused by the loss of gray matter in the hippocampus may be bothersome, it seems to serve a purpose.
Trends in Cognitive Sciences noted, “Lower hippocampal volume at 4 months postpartum is associated with positive mother–child interactions, suggesting hippocampal changes have broad implications in maternal caregiving behavior, beyond cognition.”
This “second puberty” news made its way to social media. You can listen to one Instagram creator share their understanding of Matrescence below:
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The 4 brain chemicals that make you feel amazing, and simple ways you can trigger each one
The neuroscience of creating joy.
There are simple things we know to be true about happiness: Going for a walk in the sunshine just feels good. So does a hug, or hearing your favorite song. Petting a dog puts most of us in a better mood. And so does a little bit of intense exercise. Maybe not during, but definitely after, when we’re basking in the afterglow of our effort.
The science behind life’s simple pleasures is where things start to get really interesting. Happiness isn’t just one feeling, it’s a collection of several different feelings, and many of them come from our brain’s internal pharmacy of “feel good” chemicals, or neurochemicals. They’re known as the four happy hormones: Oxytocin, serotonin, dopamine, and endorphins.
The big questions of existence like finding our purpose, doing work that matters, and finding love aside, it’s really the little things that send our brain happiness signals throughout the day. And these feelings are really easy to trigger intentionally, once you know how.
Oxytocin—Love, Bonding & Connection
Oxytocin is known as the “love hormone,” and is most famous for playing a big role during childbirth. No wonder it’s highly associated with deep feelings of love, connection, belonging, bonding, and more. In short, it feels incredible, and a burst of oxytocin can be a overwhelmingly positive and life-affirming feeling.
But you don’t have to give birth or go on a romantic date to activate this neurochemical. Here are few things you can do to release oxytocin each and every day. Some of them might surprise you:
Any kind of physical human touch can do the trick. A long hug with someone you care about is ideal, but the touch doesn’t have to be associated with love, affection, or sex by any means. The professional, friendly touch from a massage or haircut can do wonders for your brain. Hair, especially, is inherently emotional for a lot of people—in addition to the light human touch, a fresh look boosts self-esteem, mood, and more.
In the absence of touch, prolonged eye contact can be just as powerful at helping your brain release oxytocin. If there aren’t any people you love around, try your dog: Veterinarian Dr. Julie Hunt at Embrace Pet Insurance tells Upworthy, “Research suggests that more oxytocin is produced when humans have prolonged eye contact with their dogs than any other common type of interaction.”
You don’t necessarily need a willing partner to touch you or stare into your eyes, whether they have two legs or four. Dr. Clint Salo from The Grove Recovery tells Upworthy that giving someone—even a stranger—a genuine compliment can have a powerful and positive effect on us. “Giving a genuine compliment can increase oxytocin by creating a brief moment of social connection,” he says.
Taking all of those positive feelings and writing them down is another technique that yields terrific results. As cheesy as it might feel, writing a line or two of gratitude in a journal has been shown to boost oxytocin. Chelsea Pottenger, author and founder of EQ Minds, suggests another method: “Write a letter to someone you love, even if you never send it. Just by writing it, it gives an oxytocin hit.”
Finally, if all else fails, give yourself a hug. It’s both important and effective.
Serotonin—Positive Mood & Euphoria
Serotonin is an absolutely crucial piece of “feeling happy.” People who suffer from depression are shown to have low serotonin levels, and SSRIs—one of the main treatments for depression—primarily work to correct that. That tells you almost everything you need to know about the importance of this neurochemical for our overall mood, demeanor, and wellbeing. It’s a natural mood stabilizer, helps regulate our sleep cycles, promotes learning and memory, and helps arousal and libido.
There are a few simple and surprising ways you can get a serotonin boost during the day and feel better almost instantly:
Even if you don’t have Seasonal Affective Disorder, almost everyone reports feeling a little cheerier on a bright sunny day versus a rainy one. It turns out, sunlight is absolutely crucial to our serotonin levels. Dr. Sam Zand, CEO and psychiatrist at Anywhere Clinic, tells Upworthy that a few minutes of sunshine first thing in the day does wonders: “Serotonin is highly affected by light and rhythm. Getting bright natural light during the first hour of the day will really help you maintain good moods.”
Because serotonin plays such a crucial role in memory, accessing positive memories can put us in a much better mood. Lisa Chen, LMFT and founder of Lisa Chen & Associates Therapy, tells Upworthy that one of the most powerful links to memory is actually our sense of smell, and we can use that to our advantage: “Smell something tied to a happy memory, like cinnamon. Scent has a straight line to emotional memory centers and can quickly shift our moods.”
Random acts of kindness make us feel great, and now we know why: It’s the serotonin. Pottenger tells Upworthy: “Do something for a stranger without expecting anything back. When you perform a random act of kindness with no strings attached, your brain releases serotonin.”
Finally, here’s a little trick that makes good use of our anatomy. Research suggests the vagus nerve is key to triggering the release and transport of serotonin. Intentional breathwork and even light humming or singing can stimulate that nerve and give us a little extra boost.
One thing that gets in the way of serotonin is stress, and its primary neurochemical, cortisol. Anything you can do to lower stress will improve your serotonin levels, like taking a few minutes for yoga, meditation, or just practicing better mindfulness.
Dopamine—Reward, Pleasure & Motivation
We get a rush of dopamine in our brains whenever we feel pleasure or reward—whether it’s ultimately good or bad for us. Sex, sweets, drugs, gambling, flirting, achieving a goal. They all give us some form of pleasure or satisfaction, and they’re driven by this very specific (and feel-good) neurochemical.
That makes dopamine a tricky one to navigate. Chasing it can be destructive, but luckily, there are plenty of natural and healthy ways to get the same pleasurable result:
Achieving a goal, even a small one, gives us a dopamine boost. This can be as simple as checking something off your To-Do list. Zand tells Upworthy that dopamine is “very responsive to ‘micro-completions’—meaning you can get a little shot of dopamine by completing small tasks like sending a text or cleaning one area of the house.”
Believe it or not, dopamine also responds positively to novelty. Changing even small things in our daily routine can give us a lovely little tingle of pleasure: Chen suggests things “like taking a new route or trying a new coffee flavor,” while Dr. Michael Valdez, Medical Director at Detox California, says it can be as simple as moving to another room to reset attention and focus.
Dopamine loves a reward, but it also loves the anticipation of a reward. Kelly Whaling, Licensed Clinical Psychologist at Prosper Health, tells Upworthy “Anticipating a positive experience or even vividly picturing it—like planning a vacation—can trigger dopamine because your brain begins predicting a reward.”
On a more physical level, a shock of cold water can trigger a substantial surge in dopamine. Research shows that a cold plunge can cause a 250% increase in dopamine and an elevated mood that lasts several hours. In the absence of a giant tub full of ice, a 30-second burst of cold water at the end of your shower can have a similar effect.
Dopamine, however, can be a double-edged sword. We technically get a small hit of dopamine every time we log into social media and see something interesting, or when we get a notification on our phones. This constant drip overstimulates our brain’s reward center and can fry our circuitry, making us less motivated to achieve goals and finish tasks. That’s why some people advocate for a “dopamine reset.”
Eli Elad Cohen, Co-Founder and Co-CEO at MediTailor, recommends something called Non-Sleep Deep Rest. It’s a sort of guided meditation and breathwork practice that lowers stress and anxiety and helps us feel recharged when tired. “[Research from Denmark] found it increases striatal dopamine reserves by up to 65%. Better than a nap for restoring motivation.”
If that sounds too complicated, try going one hour without your phone in nature or focusing on a single task to get a similar effect.
Endorphins—Stress Relief, Pain Relief & Overall Wellbeing
In the famous words of Elle Woods from Legally Blonde, “Exercise gives you endorphins. Endorphins make you happy. Happy people just don’t shoot their husbands, they just don’t!
She’s not wrong. Harvard Health writes that endorphins are “the body’s natural painkillers,” and help relieve stress and promote an overall feeling of well-being. They most famously come from exercise—i.e. the “runner’s high”—but there are many other ways of activating them.
Endorphins respond well to the arts. Listening to music or creating art of any kind is a great way to promote that feel-good sensation in your body. Bonus points if the song you listen to gives you the “chills.”
Eating spicy foods, while sometimes challenging, can also work. “[It] activates the body’s natural pain-relief and pleasure systems,” and releases endorphins, similar to a good workout, says Kelly Whaling.
Steven Sultanoff, Adjunct Professor of Psychology at Pepperdine University, suggests laughter. If you’re feeling down, try listening to some stand-up comedy or putting on an old favorite sitcom episode. “Laughter results in the secretion of endorphins. Humor also relaxes the brain by generating perspective and shifting negative thinking to realistic thinking,” he says.
Here’s a tip you might recognize: Humming or singing quietly, stimulating the vagus nerve, can also produce endorphins.
Fascinatingly, exercise doesn’t release endorphins simply to reward you for a job well done. It does so in response to physical exertion, pain, and stress. So the rule with endorphins is that sometimes, we have to feel a little bad before we can feel good.
Dr. Michael Drzewiecki, Director of Clinical Neuroscience at The Neurologic Wellness Institute puts it this way: “Doing hard things for short periods of time releases ‘feel bad’ chemicals called dynorphin, which leads to an upregulation of endorphin receptors. Essentially, to get a greater release of ‘feel good’ chemicals, it’s best to do something hard enough to trigger a short duration of ‘feel bad’ chemical release.”
Take this as a sign to finally have that tough conversation, tackle that home project, or challenge yourself physically and mentally.
Stacking the four for the best results
The four “happy brain chemicals” don’t always work alone. Many times, they operate in tandem.
There are many different dietary strategies and theories out there about how to optimize your brain health, but there does seem to be at least one “super food,” when it comes to feeling happy: Dark chocolate. Research shows that dark chocolate, ideally 70% cocoa or higher, can release oxytocin, serotonin, endorphins, and dopamine all at once.
But if you’re not a fan, don’t worry. Many of the tips and activities recommended by experts serve many purposes at once. Going for a walk in the sunshine with your dog can give you a rush of serotonin and oxytocin. Pairing breathwork and meditation before or after a workout can give you endorphins and serotonin. “Romantic time” with a partner can give you all four simultaneously.
We have more control over how we feel than we might think. While petting a dog or having a nibble of dark chocolate can’t account for your overall satisfaction and contentment with life and existence, these little daily things can bring us substantial joy in the moment. When we stack them consistently, we’re bound to feel pretty damn happy most of the time.
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Humans used to have a ‘first sleep’ and ‘second sleep’ at night. Here’s why that changed.
People relished having an extra two hours in the middle of the night to do chores, pray, or hang out with their loved ones.
One of the unquestioned pieces of health advice we’ve heard for decades is to get eight hours of sleep every night, with the assumption that it should be as close to consecutive as possible. However, a fascinating discovery by historian Roger Ekirch in the early 1990s found that, as far back as recorded history and up until the Industrial Revolution, human beings slept in two distinct phases every night: “first sleep” and “second sleep.”
The wild thing about Ekirch’s study was that the evidence of biphasic sleep was staring us in the face the whole time; we just turned and looked the other way. Ekirch was researching a book on human nighttime behavior when he came across a 1697 legal document in a London record office. In a deposition by a nine-year-old girl, she revealed that her mother left the house after “first sleep” and was later found dead.

A woman sleeping. Photo credit: Canva The first glimpse at “first sleep”
“I had never heard the expression, and it was expressed in such a way that it seemed perfectly normal,” Ekirch told CNN. “I then began to come across subsequent references in these legal depositions, but also in other sources.”
Further research revealed that first and second sleep routines date back as far as the 8th century B.C.E.
Historically, humans flopped onto their beds sometime between 9 p.m. and 11 p.m. and slept until around 1 a.m., followed by a period of wakefulness known as “the watch,” which was an incredibly productive time.
“[The records] describe how people did just about anything and everything after they awakened from their first sleep,” Ekirch told the BBC.
What you did during the watch depended a lot on your social status. Peasants would take the time to tend to their livestock or perform domestic chores. Religious people took the time to pray and practice their faith, as they would face fewer distractions than during daylight hours. The watch was also a great time for people to relax and talk to one another; for couples, it was the perfect time for intimacy.
Two sleeps a night is completely natural
A 1992 study by Thomas Wehr from the National Institute of Mental Health took a group of volunteers and removed all natural light from their lives so they could live like humans before the discovery of fire. Within weeks, every participant settled into a biphasic sleep pattern. Wehr measured their hormones during the wakeful period in the night and found that the participants produced elevated levels of prolactin, the same hormone released during meditation and after orgasm. This wakeful period wasn’t just a change in their sleep-wake cycle, but it was another state of consciousness altogether.
Why did human sleep patterns change?
So what happened? How did we switch from centuries of biphasic sleeping to sleeping in one long, uninterrupted chunk (unless, of course, you have insomnia)? One reason was that in major cities of the industrialized world, street lamps and other lights began to be installed in the 1700s to improve public safety, encouraging people to stay out later at night.

Lanterns on the forecourt of a pier at sunset in Germany. Photo credit: Dietmar Rabich/Wikimedia Commons The Industrial Revolution also brought about changes in modern work schedules.
“The answer is really to follow the money,” Ben Reiss, author of Wild Nights: How Taming Sleep Created Our Restless World, told CNN. “Changes in economic organization, when it became more efficient to routinize work and have large numbers of people showing up on factory floors, at the same time and doing as much work in as concentrated fashion as possible.”
The invention of the alarm clock in 1787 also had a big effect on the average worker’s sleep schedule.
Ultimately, the history of biphasic sleep shows how much of humanity’s natural patterns have been disrupted by modern technology. One wonders what would happen to our collective mental and physical health if we returned to the way we slept before the Industrial Revolution.
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A 21-year-old kept her symptoms secret out of embarrassment and it led to a life-changing diagnosis
“I think I would have gone a little longer without losing my bowel had I gone to the doctor earlier.”
Alex Lyons is on a mission to make sure no one else suffers in silence. The 21-year-old from Armagh, Northern Ireland, spent months hiding a secret that she feared was too “gross” or “humiliating” to share with her friends and family. But as the BBC reported, that silence nearly cost her everything.
The health costs of staying silent with IBD
Lyons first noticed she was having frequent, urgent bowel movements and spotted blood in her stool. Instead of seeking help, she ignored the signs, hoping they would simply go away. Her hesitation was rooted in a deep sense of embarrassment and a desire to protect her family. Her twin brother, Joe, had recently undergone bowel removal surgery due to a chronic condition, and Alex didn’t want to put her parents through that trauma a second time.
Unfortunately, the symptoms of inflammatory bowel disease (IBD) do not wait for a convenient time to be addressed. By the time Alex finally disclosed her struggle, her condition had progressed to a life-threatening level. She was diagnosed with ulcerative colitis, a form of IBD that causes chronic inflammation and ulcers in the lining of the colon. According to the Cleveland Clinic, these symptoms are often caused by an overactive immune response, and as seen in the case of Alex and her brother, genetic factors often play a significant role.
The inflammation was so aggressive that standard treatments could no longer save her bowel. She was rushed into emergency surgery, a procedure that saved her life but changed it forever. “I think I would have gone a little longer without losing my bowel had I gone to the doctor earlier,” Alex told the BBC.
From ambulance to advocacy
Now, Alex is using her voice to dismantle the stigma that kept her silent. She has become a viral advocate on TikTok, documenting her life with a stoma bag and showing her followers that a medical diagnosis doesn’t mean the end of a vibrant life. She refuses to let her condition stop her from wearing her favorite clothes or going out with friends.
Speaking out about Ulcerative Colitis
The lesson Alex wants to share is simple but vital: speaking up sooner matters more than avoiding a few minutes of discomfort. What might seem like a minor, embarrassing issue can develop into a serious health crisis if left unaddressed. As Alex and her brother continue their healing journey together, they are proving that there is no room for shame when it comes to saving your own life.
Follow Alex Lyons (@alex.lyonss) on TikTok for more content on health and lifestyle.
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His mysterious toe pain lasted five years. The scan that finally caught it gave him four days to live.
“If my whole leg hadn’t swollen up, I would have dropped dead.”
Richard Bernstein walked around barefoot a lot at home, so when his right toe started hurting in 2017, he assumed he’d stubbed it. A visit to his podiatrist confirmed nothing was broken and nothing was wrong. He moved on.
But the pain didn’t.
Five years of pain that no one could explain
Over the next few years it crept upward from his toe to his ankle, then to his knee. A sports medicine doctor suggested stenosis and recommended physical therapy. That didn’t help either. Walking became gradually harder. On a trip to Greece, Bernstein had to sit out while his friends climbed to hilltop monasteries. He took his dog to the park less and less.
In March 2022, his right leg swelled noticeably. His doctor ordered an abdominal scan. What it found changed everything.
What they found when they finally looked
Bernstein had a massive cancerous kidney tumor that had grown into his vena cava, the main vein that returns blood from the lower body to the heart. The tumor and tumor thrombus were a foot long and weighed around two and a half pounds. Because the vena cava was almost completely blocked, blood was backing up in his lower extremities, which explained the years of unexplained pain creeping up his right side. His two main coronary arteries had also been compromised, with 99 percent of their function lost.
He was referred to Dr. Michael Grasso, chair of urology at Phelps Hospital. Grasso’s assessment was direct. “He told me I had four days to live,” Bernstein said.
A 12-hour surgery, three specialists, one chance
The surgery required three specialists working simultaneously over 12 hours at Lenox Hill Hospital in New York City. Dr. Grasso handled the kidney and tumor removal. Cardiothoracic surgeon Dr. Jonathan Hemli performed a double bypass on the coronary arteries, which had been discovered only once Bernstein was already admitted, an unexpected complication that Hemli said they couldn’t ignore. “It would have been really disappointing to cure him of his kidney cancer only to learn in six months, nine months, a year that the poor man had a heart attack and didn’t survive,” Hemli told TODAY. Vascular surgeon Dr. Alfio Carroccio opened the vena cava to remove the tumor thrombus, which extended all the way into the heart.
To do the work safely, the team had to cool Bernstein’s body, stop his heart, and run him on a heart-lung bypass machine while they operated. Then they slowly warmed him back up and restarted his heart.
Bernstein spent three days sedated afterward, a week in intensive care, and nearly three weeks in cardiac rehab relearning to walk. He lost around 30 pounds. He gained it back.
He’s now on ongoing immunotherapy and doing twice-yearly scans. Dr. Grasso’s update: “The cancer hasn’t spread anywhere else, which is amazing, considering where he came from.”
Bernstein’s own assessment of how he got through it: “My attitude is ‘it is what it is, and there’s not much we can do about it.’ That got me through.” His advice for anyone else in a similar situation: “If something is wrong and they can’t find it, don’t give up looking. Trust your feelings about your own body.”
And on the swollen leg that finally triggered the scan that saved him: “If my whole leg hadn’t swollen up, I would have dropped dead.”










