'There cannot be mental atrophy in any person who continues to observe, to remember what he observes, and to seek answers for his unceasing hows and whys about things.'

'Mr. Watson, come here. I want to see you.'

- Alexander Graham Bell's first words transmitted via telephone (March 10, 1876)

'Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world.'

- Albert Einstein

'Adults ask questions as a child does. When you stop wondering, you might as well put your rocker on the front porch and call it a day.'

- Comedian and late night host Johnny Carson (1925–2005)

'Happiness depends more upon the internal frame of a persons own mind—than on the externals in the world.'

- George Washington (1732-1799)

'Be silent, if you choose; but when it is necessary, speak—and speak in such a way that people will remember it.'

- Wolfgang Amadeus Mozart (1756–1791)

'The urge to explore has propelled evolution since the first water creatures reconnoitered the land. Like all living systems, cultures cannot remain static; they evolve or decline. They explore or expire.'

- Astronaut Buzz Aldrin (1930-present)

A history of "Memento Mori," from the ancients to today

The ancient Latin phrase 'memento mori' means 'remember you will die.' The counterintuitive utterance has long provided a moral and spiritual framework for individuals to evaluate their life's decisions and worldview. Though it appears morbid at first glance, the saying is meant to inspire a thirst for life. Review the various ways the idea has inspired different cultures in this article, from the Romans and Egyptians to contemporary tech leaders like Steve Jobs.

Wilhelm Wundt, the forgotten father of modern psychology

He was the first psychologist to call himself one, and he influenced a whole generation of early psychologists. Learn about the life and works of Wilhelm Wundt with this thorough entry from a philosophy encyclopedia.

Watch a USA Memory Champion answer questions about memory

Six-time USA Memory Champion, Nelson Dellis, answers popular questions about memory, from how sleep, stress, emotion, and attention influence memory to ways techniques like the memory palace, mnemonics, and the PAO system can dramatically improve recall.

'The man who views the world at 50 the same as he did at 20 has wasted 30 years of his life.'

- Boxing champion Muhammad Ali (1942-2016)

'Her own thoughts and reflections were habitually her best companions.'

- Legendary author Jane Austen (1775 -1817)

Thomas Edison, eager to communicate with ghosts, tinkered with an apparatus called the 'spirit phone'

The inventor was interested in developing a scientific method for communicating with the dead. He was not interested, though, in the occult figures who believed the dead could be reached through Spiritualism, which he found childish. He believed those kinds of people "permit themselves to become, in a sense, hypnotized into thinking that their imaginings are actualities."

'Mental hygiene' was the 1843 term for mental health

It was coined by American psychiatrist William Sweetzer to reference the same idea as personal hygiene. Mental hygiene, in Sweetzer's view, needed to be maintained in the same way people attend to their personal cleanliness, an idea that was supplanted by better understanding of the complexities of mental health disorder causes in the decades that followed.

Writer Christopher Hitchens on why Orwell matters

In this 2008 segment with NPR, the author of "Why Orwell Matters" discusses his admiration for the author and fields questions from callers. Hitchens notes that anyone can write about tyranny, but that Orwell's brilliance is in exploring why people "are so keen to obey."

Some of the 'Jeopardy!' host Alex Trebek's best quotes

"The secret to happiness, of course, is not getting what you want; it's wanting what you get."

What is the brain up to when the mind wanders?

As you stare into the distance while washing your home's seemingly never-ending pile of dishes, the brain activates its default mode network. This collection of "task-negative" brain regions associated with memory, reward, action consideration, and prediction alight with activity when humans mentally turn inward, possibly giving rise to the brain's ability to wander and humans' ability to construct internal narratives about the world.

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...

Some founders of quantum mechanics thought consciousness could influence phenomena

Since quantum systems exist as a superposition of states before producing a definitive outcome, some quantum pioneers wondered if the act of conscious observation was what collapsed the wave function of possibilities into one state.

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.

Hear history nerd Ray Dalio talk about making decisions during times of uncertainty

For Dalio, history is the best teacher. Dalio emphasizes relying on and respecting the past as a framework for the future, so that during unsettling times, people still make good decisions.

Y Combinator cofounder Paul Graham keeps a public archive of his insightful essays

In addition to cofounding Y Combinator and other companies before it, Paul Graham is a prolific writer and artist. He chronicled many of his thoughts while building Y Combinator in a series of dozens of candid essays, all of which you can read in an online archive.

Dr. Bruce Greyson on what we know, and how to study, near-death experiences

Considered one of the premier researchers on near-death studies, Dr. Bruce Greyson discusses what researchers know (and don't know) about what happens as we near death, and recounts his decades of observations on the phenomenon.

Why millions of telegrams are still sent every year

Telegrams enabled much faster communication across distances when they were invented in the 1800s, but they became generally obsolete after emails and cell phones were widely adopted. So why are 17 million still sent every year? A combination of factors: the legal requirement to send paper documents far and fast, the resistance to updating processes, and nostalgia. Explore more with this video.

Can your identity be preserved amid dementia?

Memory loss associated with progressive dementia raises questions about whether a person's identity can be maintained during the disease's progression. One outlook suggests we define ourselves by our social relationships—offering a potentially more humane approach to caring for those with dementia.

The anechoic chamber at Bell Labs absorbs 99.999% of created sound

The space nearly eliminates sound wave reflection, allowing visitors to become aware of noises created by their own bodies, including their heartbeat and skeletal conduction. Experiments inside have contributed to the development of digital audio and phone touch tones.

Finding delight through your five senses

Digging into your immediate senses is shown to benefit your overall psychological well-being, from the happy memories evoked by familiar scents or through the transformative power of birdsong. This episode from the Science of Happiness podcast highlights insights from Gretchen Rubin, an author who has written books on the importance of engaging your senses for a happy life.

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

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.

Alzheimer's can lead to brain shrinkage, with an average of around 2% of volume reduction per year

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

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.

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.'

The concept of phantom limbs, the perception that amputated limbs are still present, dates back to a French military surgeon in the 16th century.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

At the beginning of the 20th century, a group of young men ate standard American food—replete with food additives like borax and formaldehyde—as part of government research to better understand food safety.

Salvador Dalí believed he was his own dead brother, who had died nine months before he was born

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.

Learn how your body is, scientifically, like a firework with its own slow, controlled burn.

Search a massive database of over 4 decades of clues from the TV quiz show 'Jeopardy!'

In 1939, baseball star Lou Gehrig delivered his inspirational 'Luckiest Man' speech after retiring due to the health condition that now bears his name.

Before writing 'Walden,' transcendentalist Henry David Thoreau nearly burned down his hometown with a campfire that grew out of control.

This site reaches millions of visitors who are tired of AI chatbots and seeking human connection. Pretend to be an AI chatbot and ask questions, provide answers, and draw for people in real time.

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

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.

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

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.

Double world record holder Hunter Ewen helped conquer his fear of balloons, called globophobia, by training to win Guinness World Record titles for balloon inflation.

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

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

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