Later in life, the clock in Grace Hopper's office ran counterclockwise

Grace Hopper warned against prioritizing hardware purchases in future computing

Foreseeing the rising volume of data and the increasing demand for its processing and access, she advocated that organizations first map the total flow of information they require and then choose infrastructure to support it, rather than wastefully spending on the fastest computing technology and forcing software to compensate for unnecessary hardware or incorrect data.

At the age of seven, Grace Hopper dismantled alarm clocks

Foreshadowing a career in computers, Hopper exhibited a curiosity for gadgets at a young age and took apart seven clocks, determined to understand how they worked. Despite having a dollhouse, Hopper built an elevator for it and showed a greater interest in building toy furniture than playing with dolls.

Grace Hopper was named the 1959 Time magazine 'Woman of the Year'

The honor was part of the 2019 series "100 Women of the Year," which spotlighted an influential woman for each of the years the publication had previously awarded a "Man of the Year." In its write-up, Hopper was described as having "paved the way for women everywhere to thrive in math, computer science, and service to their countries."

Watch Grace Hopper's appearance on the 'Late Show with David Letterman'

During this comedic interview, Hopper describes her 43.5 years in the Navy, an anecdote about when President Reagan promoted her, and provides a visual aid to explain the transmission of information at the nanosecond scale via electricity.

'No big challenge has ever been solved, and no lasting improvement has ever been achieved, unless people dare to try something different.'

- Apple CEO Tim Cook (1960 - present)

The Year 2038 problem is the next potential computer time rollover bug

Many older systems store time as a signed 32-bit integer counting seconds since Jan. 1, 1970. That counter maxes out on Jan. 19, 2038—overflowing into negative time and sending clocks back to 1901, potentially crashing any older software that depends on accurate dates.

1975: Betty Ford, remarks at the International Women's Year Conference

"Change, by its very nature, is threatening but it is also often productive."

Mac settings have evolved from minimalism to chaotic clutter

The 1984 Mac control panel featured wordless icons, sliders, and desktop pattern editors, highlighting early experimentation in graphical user interface design. This software charm and personality gradually disappeared as Apple enforced visual and functional consistency over time.

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.

A 2,000-year history of alarm clocks

Clocks have revolutionized the way we live, structuring our days into abstract, regular units and providing quantification for those who are chronically late. The alarm clock was the next obvious step: clocks which not only tell you the time but...

The life of Edward Lorenz, who originally used a seagull in his 'butterfly effect' metaphor

By accidentally finding that rounding one variable to its third decimal place and re-running a weather simulation produced a drastically different two-month forecast, the American mathematician established the field of chaos theory. His paper—"Predictability: Does the Flap of a Butterfly's Wings in Brazil Set off a Tornado in Texas?"—introduced the well-known metaphor for the behavior of chaotic systems. (Some readers may experience a paywall.)

Two 100-year-old sisters share their tips for staying mentally sharp

Shirley Hodes, 106, and her sister Ruth Sweedler, 103, don’t routinely do crossword puzzles, but both have stayed sharp as they aged. Though they live states apart, they share similar advice for maintaining mental acuity. They sum up their strategies for cognitive health with four verbs: work, connect, learn, and appreciate. Read this article to learn more about their approach to staying 100-plus years young.

'In life, unlike chess, the game continues after checkmate.'

- Isaac Asimov

A 94-year-old stumbles upon a photo of herself from 1947 at an airport

Earlier this year, Gwendolyn Bruhn, who worked for Hawaiian Airlines in the 1940s, spotted herself in a photo blown up on an airport wall. Here's her story.

A life measured on the backs of coffee receipts

Years ago, a storyteller doodled on the back of a receipt. Hundreds of doodles later, Odding Wang has created a digital diary with a tactile feel. Click through the project's website to peruse the portals into Wang's life and mind. Hovering over a comic will reveal the receipt on the other side.

Climate determinism wrongly linked human traits and societal progress to geography

Historically rooted in Greek philosophy, its ideas used the latitudes where people were located to justify racial hierarchies, casting tropical peoples as lazy or inferior. These biases still influence how media and research portray people in climatically disadvantaged regions. (Some readers may experience a paywall.)

Modern workplaces were engineered for efficiency, not work-life balance

Modern work organization traces back to 19th-century scientific management, an approach that optimized output by viewing workers as machine components. That logic still persists today and contributes to burnout, stress, and disengagement. Researchers propose a "circular work" model that combines effort with recovery, learning, and renewal, suggesting productivity and well-being should align rather than compete.

Voyager spacecraft defied expectations and only powered down after 47 years in space

Originally built for a four-year mission, Voyagers 1 and 2 used a rare planetary alignment and gravity assists to reach interstellar space. With limited power and aging systems, they will continue to send data until the mid-2030s. (Some readers may experience a paywall.)

Fintech companies made it easier for merchants to request tips, leading to fatigue

In recent years, companies such as Square and Toast have created touch screen technologies prompting customers at coffee shops and casual restaurants to tip upwards of 25%. Despite the interesting psychological conundrum this presents to consumers, one tech columnist argues that shoppers don’t need to succumb to the pressure.

The doorway effect is when people forget their task when entering a new space

The "why did I come in here?" feeling after walking into a room comes from the brain creating event boundaries to organize memories. Mentally revisiting a previous room can help recall tasks and reverse memory loss. (Some readers may experience a paywall.)

The best predictor of success.

Leaving a high-flying job in consulting, Angela Lee Duckworth took a job teaching math to seventh graders in a New York public school. She quickly realized that IQ wasn’t the only thing separating successful students from those who struggled. Here, she explains her theory of “grit."

Read about why Bumble founder Whitney Wolfe Herd stepped down as CEO in 2024 only to return in 2025

When Wolfe Herd stepped down as CEO in 2024, assuming an executive chair role, she said she was eager to return to her "founder roots" and do more big-picture thinking. However, when her replacement as CEO, the former Slack CEO Lidiane Jones, left the company "for personal reasons," Wolfe Herd once again assumed the CEO role. (Some users may experience a paywall.)

Explore an animated list of nine scientific breakthroughs funded by NASA, the NSF, and the NIH

Among the technologies made possible by the National Science Foundation and the National Institutes of Health were the CAPTCHA digital puzzles to block bots from accessing sites, the set of diabetes and obesity drugs that fall under the umbrella of GLP-1 receptor agonists, and various cordless appliances, including the handheld vacuum cleaner. (Some readers may experience a paywall.)

Inside a congressional office, the scheduler is more powerful than you think

A former congressional scheduler explains that a member's time is the scarcest resource in any Hill office, and controlling the calendar means understanding every competing claim on it, from the legislative team to the member's family. The interview demystifies how a typical House office actually functions, from staff hierarchies to outside resources like the Congressional Research Service.

The typo that scandalized a continent

One printing mistake in the 17th century proved so unfortunate it cost two men their careers and scandalized religious folks for centuries. Read the story here.

Claude Shannon, for whom Anthropic's AI tools are named, proved the existence of an unbreakable cipher

In the one-time pad approach, the encryption key is randomly generated and of equal length to the plaintext. This randomness ensures that every possible plaintext is equally likely—RBBHN can mean HELLO, SOLVE, CODES, and so on, using a different key—while matching the message and key lengths prevents the appearance of patterns that can be exploited.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

After NASA's Voyager 1 captured Earth as a single pixel as it left the solar system in 1990, astronomer Carl Sagan used the image to reflect on humanity's fragility and the responsibility to protect 'the only world we've ever known.'

A vending machine run with Anthropic's AI went out of business after it was convinced to give away items for free and sell a video game console.

Explore chaos in this simulation of two double pendulums, where small differences in the release angles produce wildly different outcomes.

Dorothy's famous entrance into Oz in 'The Wizard of Oz' relied on analog tricks, including a body double and sepia-toned paint, as much as it did on technology

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

Up to a million Girl Scouts sell about 200 million cookie boxes every spring, generating $800 million, largely because refusing a child is frowned upon

The first line of 'immortal' human cells, which can divide indefinitely and are used in scientific research, was nonconsensually taken from a Black woman.

A century of Billboard issues documenting the evolution of popular music.

American dance legend Martha Graham, sometimes called 'the Picasso of dance,' refused to perform at the 1936 Olympics in Berlin and conceived the piece 'Chronicle' in response to the experience.

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

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

American short story writer Flannery O'Connor raised 40 peacocks, which became potent symbols for her fiction's elegant violence

Explore fun facts from the USPS, including unique post office buildings, a stamp that traveled past Pluto, and more.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

Apeirophobia is an overwhelming fear of living forever, perhaps stemming from the brain's inability to conceptualize an infinite life.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

A Yale student wrote a profound essay about the consulting industry's influence on elite college students that was published in a book of her writing after she died in a post-graduation car accident.

Hurricanes, which rely on air consistently spinning in the same direction, cannot cross the equator because air curves in opposite directions north and south of it.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'