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.

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.

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.

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. 

The loneliness epidemic has reached a critical mass, with the Surgeon General warning that social isolation can have dire health consequences. Tons of research backs it up: Being lonely can make us sick.

For many years, patients have been screened for loneliness and offered only a few limited options: Therapy and medications that treat symptoms of loneliness like insomnia, depression, or heart problems.

But recently, doctors have been taking a far more radical approach: What if they actually treated the loneliness itself?

“Social prescribing” trend takes off

Doctors cant befriend their patients, but more and more they’ve been leaning on a concept called “social prescribing.” It’s a way of treating the whole patient and not just the symptoms.

How? By writing prescriptions for things like nature walks, art classes, book clubs, singing lessons, and more. All of these activities are shown to boost mental health, decrease loneliness, and create a domino effect of positive health outcomes.

It’s not just loneliness that can be treated by social prescribing. Depression, anxiety, and chronic pain can all benefit from community-based, real-world activities.

How social prescribing works

A person dealing with loneliness might be asked to take part in a community class, volunteer, or even use a service that helps them make friends.

Depression patients might be asked to spend more time in nature through a birdwatching group or nature-walk group They may also be enrolled in art classes.

Doctors frequently tell people to exercise more, but social prescribing sees them direct chronic pain patients, for example, to specific group exercise classes.

It can be even simpler than that, too. Someone who’s isolated because they’re a caretaker for a family member might be asked to simply go to a coffee shop a few times per week. A person who’s feeling down and disconnected due to remote work might get a social prescription for joining a group or social club. Someone who’s dealing with stress and anxiety related to finances might be assigned to meet with a debt management specialist.

How it works from a logistical standpoint depends on the doctor and where you live. In the UK, social prescribing has officially been adopted by the NHS. Patients in need will be referred by their doctor to a “link worker” whose sole job is to connect them to the right community resource.

In America, social prescribing is still in more of a fledgling state. Fortunately, though, more and more local pilot programs are popping up around the country to provide the same support. Experts believe that even in the United States’ heavily privatized model, it can still........

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