Why you should work 4 hours a day, according to science

Studies suggest when you sleep is as important as how much you get

"Molecular clocks" made of timekeeping proteins and genes help regulate the body and its processes, meaning the disruption of one cog will impact another. Those who live in sync with their circadian rhythms report less fatigue, clearer thoughts, greater medication benefits, and better long-term health outcomes.

Studies suggest when you sleep is as important as how much you get, and syncing with your circadian rhythms may lead to less fatigue and improved long-term health outcomes

The lost medieval habit of 'two sleeps'

While most people accept a single seven-to-nine-hour nightly slumber is ideal, the approach is a relatively modern idea. For centuries, interrupted sleep was the norm, with historians uncovering descriptions of two periods of sleep during the normal 24-hour cycle.

Tracking annual working hours per worker in major countries

In 2023, China's workers averaged 2,328 hours per year, far ahead of the second country on the list, the United States, at 1,789. This chart shows the relative decrease of total work time across the world since the late 1800s.

Overwork contributes to thousands of worker deaths

Can work really kill you? The World Health Organization and the International Labor Organization have estimated that long work hours contribute to thousands of death from strokes and heart attacks each year. This BBC article argues that the culture of overwork and burnout is leading to a public health crisis in desperate need of solutions.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

Some animals seem to live well on little sleep

African bush elephants typically sleep for about 2 hours per 24-hour day, coming in well under a human's recommended seven-hour minimum. Other animals also appear to skimp on sleep, by human standards, without the consequences humans associate with being sleep deprived. This academic article details the sleeping habits of animals that appear to thrive on fewer than 40 winks and explores whether their sleep processes are just built different.

'Slow productivity' as a humane approach to work

Work is increasingly encroaching on every part of our lives, while digital technologies enable supervisors to micromanage every part of an employee’s day. “Slow productivity” is a movement to alter the pace and quality of one’s work to avoid burnout and provide a more humane approach to work.

How to know if you're a workaholic

Are you a workaholic, or do you simply enjoy work? As it turns out, there's a big difference between putting in long hours at the office because you enjoy your job and actually having a work addiction. If you're reading this on hour 12 of your 14-hour workday and wondering which category you fall into, peruse this article to find out.

Investment banking jobs are famous for their long hours

Although some banks report attempts to cap hours for junior employees at 80 hours per week, these employees often continue working many more hours than that. Goldman Sachs analysts, for instance, went viral back in 2021 when they put together a PowerPoint deck complaining of 100-hour work weeks and mental health struggles.

Eliminating distractions is essential to improving one's attention span

Setting a baseline, removing distractions, establishing focus rituals, taking breaks, and finding purpose in your task are five science-backed practices that can help address a short attention span. Bestselling author Daniel Pink breaks down how to approach each part of the plan and introduce these habits to your life today.

Understanding Thoreau's critique of American work

John Kaag, a coauthor of "Henry at Work: Thoreau on Making a Living," explains how the writer is often mischaracterized as a layabout who avoided responsibilities. Kaag, though, notes that Thoreau was a jack-of-all-trades—working as a schoolteacher and a handyman, and even for his father's pencil-manufacturing company—who came to believe that relentless striving was getting in the way of authentic living.

Scholars believe Dickens wrote over a million words of nonfiction

The author began writing professionally in his teens, first as a court reporter, then for many papers, penning op-eds, criticism, and other miscellany. While Dickens is often discussed as a novelist, he has a massive corpus of works situated in reality.

Elon Musk is known to sleep under his desk during intense periods of work

The tech company founder and CEO has a wide variety of leadership principles he has kept consistent while building multiple different companies, including eschewing middle management and using the "idiot index," a formula he uses to identify manufacturing inefficiencies.

'Early to bed, early to rise, work like hell, and advertise.'

- Ted Turner, on his secret to success (1938-2026)

There's some evidence that working from home has helped the environment

Those who work fully remote can have a 54% lower carbon footprint than on-site laborers, according to one 2023 study. For instance, the share of Americans driving to work alone decreased by about 7% between 2019 and 2022, significantly reducing vehicular emissions.

The exercise sweet spot is shorter than you'd think—and longer workouts aren't generally better

A meta-analysis concluded that resistance training for about 60 minutes per week provided the best health benefit—decreasing the likelihood of death for individuals within a specific timeframe around 27%.

The hour originated from an ancient Egyptian astronomical system

The movements of astronomical objects, measured in a day and a year, form the foundation of our sense of time. The Egyptians divided each day and night into 12 time eras, using arbitrarily selected stars as references rather than movements of specific celestial objects.

Why humans survived and smarter species did not

This interview with Joseph Henrich, a renowned professor of human evolutionary biology, unpacks human history. Henrich shares interesting information about why humans succeeded as a species (the answer isn't IQ), how cultural evolution works, why the human brain is shrinking, and how the Catholic Church played a role in the Industrial Revolution. Listen and watch for a deep dive into human evolution.

The ‘three-martini lunch’ was popularized on Madison Avenue

Advertising executives working on Madison Avenue in the 1960s and ’70s popularized the so-called “three-martini lunch” between businesspeople during the work week. Admen of the time supposedly believed alcohol brought more creativity to the second half of their workday. This article explains why three-martini lunches are no longer commonplace.

Einstein and the fourth dimension

How Einstein's greatest theoretical achievement contains a simple but mind-bending proposition—the dimension of time is physically connected to the three observable spatial dimensions.

Eight ways literature can make us happier

Novels are often characterized as a form of cultural escape, but psychologists argue there are health benefits to the many elements comprising fiction. The Greek philosopher Aristotle explored this in his "Poetics," asking if literature was something meant to make us happier. This article highlights eight different innovations common to literature that provide psychological benefits, including the plot twist and more.

The Benjamin Franklin letter that anticipated daylight saving time

Benjamin Franklin did not invent daylight saving time. But while living in Paris, he did pen a satirical letter to Parisians suggesting they could save money on lamp oil by changing their sleep schedules. Read it in full here.

Dangers of a record-breaking, sleep-skipping stunt

In 1963, 17-year-old Randy Gardner decided to stay awake for as long as it took to break the current world record. He managed to stay awake for 11 days. In 2017, the then-71-year-old Gardner told NPR that his experience had come back to haunt him as insomnia. The challenge has since been removed from the Guinness Book of World Records due to its dangerous consequences.

The calendars of the 'Lord of the Rings'

JRR Tolkien's epic fantasy trilogy "The Lord of the Rings" is a seminal work in the history of literature partly due to its creator's obsessive focus on systematic detail—including the calendars used in the world. Take a fantastic dive into the minutiae of Tolkien's creation by learning the different approaches to time organization in the Shire or Rivendell with this dense, comprehensive resource based on Tolkien's appendices.

Sartre wrote an 8-hour screenplay for a Freud biopic

Sartre was hired to write the screenplay for what would eventually become John Huston's 1962 film "Freud: The Secret Passion," about the life of the psychoanalyst. Sartre, however, had trouble sticking to the parameters of Hollywood. An early draft was estimated to be five hours long. Rather than shortening it, as Huston suggested, Sartre extended it to eight hours and was eventually removed from the production.

Read Charles Darwin's description of his tinnitus suffering

When he was 57 years old, Darwin wrote to a new doctor about his suffering from a variety of maladies, including "singing of ears", vomiting, recurring flatulence, vomiting, and more. He noted how he believed his stress contributed to these symptoms.

See the most iconic photos from four decades of LIFE magazine

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

Against his wishes, Albert Einstein's brain was removed before his cremation, and the pathologist responsible stored it for decades in mason jars within a beer cooler.

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

SpongeBob exemplifies Aristotle's philosophy for living well because he understands that happiness doesn't come from external factors like money, recognition, or power.

Famed poet TS Eliot rejected the manuscript for George Orwell's political fable 'Animal Farm,' writing that its criticism of authoritarianism was not 'the right point of view.'

Bone marrow (soft tissue found inside certain bones) generates roughly 500 billion new blood cells each day

Despite being favored by 87% of Americans, Congress does not have term limits.

English mathematician Ada Lovelace wrote the first computer algorithm a century before computers existed and hypothesized that computing devices would one day be able to compose music—foreseeing the generative AI systems of today.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

Netflix profits when you're not watching, and its movies are designed that way—read a detail-rich critical essay exposing lesser-known Netflix takes

Use this calculator to find the dollar value of your mental load, from meal planning to coordinating after-school care for your children.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

According to the physics of black holes, our 4D reality may be a hologram—a projection of information coded on a 2D surface on the edge of the universe.

Crows are believed to have intelligence on par with a seven-year-old child and demonstrate complex behaviors, from problem-solving with tools to recognizing human faces.

Legendary architect Frank Lloyd Wright designed the SC Johnson headquarters in Wisconsin, aiming to make a cathedral-like workplace

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

After the Boston Tea Party, colonists switched to coffee, which became the main morning drink for revolutionaries.

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

Scientists testing how climate change affects plants found, in a years-long simulation study, that poison ivy grew 70% faster with the resulting extra carbon dioxide.

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

NBA superstar Victor Wembanyama spent the 2025 summer training with monks in central China to enhance his body and mind.

Children are now three times more likely to say they want to be a YouTuber when they grow up than an astronaut, with some even attending 'YouTube camps' that teach kids how to create content for the platform.