close

Big Think

A neuroscientist’s guide to protecting your brain, in 58 minutes

Neuroscientist Lisa Genova explains how to protect your brain against Alzheimer's and the science of forgetting.

Memory is not a war in your brain between remembering the good guy and forgetting the bad guy. Human memory is amazing, and it's fallible.

Einstein’s E = mc² is only half of the full equation

Einstein's most famous equation is E = mc², which describes the rest mass energy inherent to particles. But motion matters for energy, too.

You give great advice to everyone except yourself. Here’s how to change that.

"Self-distancing" explains why the advice you’d give a friend in five minutes is the advice you can’t give yourself in a month.

The strange, and occasionally violent, origins of American news

When editors dueled with pistols at dawn and news went viral for pennies.

A single illustration reveals the entirety of cosmic history
After a period of cosmic inflation came to an end, the hot Big Bang commenced. 13.8 billion years later, we arrived. Here's how we got here.

Ethan Siegel

Illustration of the universe’s timeline from the Big Bang to the present, showing key events in cosmic evolution with labeled galaxies, stars, and cosmic structures.
Black text on a light background reads "Explore our LIBRARY" with "Explore" in large font and "our LIBRARY" in smaller, uppercase font underneath.

What would you like to learn more about? We have thousands of videos from the world’s biggest thinkers to help you dive deeper into any subject.

Pause the busyness of life to reflect on ourselves, our relationships, and the Universe.
A silhouette of an adult holding a young child, both faces partially visible, embodies the tenderness of parenting against a soft, gradient blue and beige background. Do parents know best? 3 experiments that tried to replace moms and dads
The family might be a terrible way to raise kids. But it's the best we have.
Two beach umbrellas, one striped and one red, shade a folding chair with a towel draped over it on the sandy beach—inviting you to rest and unwind by the shore. 3 reasons why holidays aren’t making you more relaxed
If you're going to relax, don't do it halfway.
A silhouette of a seated person with colorful gaming achievement icons, such as trophies and badges, where their head would be, on a green background. How gamification can ruin your life
The cartoon owl wants to have a word.
A classical painting depicts Kairos, a winged, bearded man with curly hair, holding a pair of golden scales against a light blue background. Kairos: The ancient Greek art of knowing when to act
A white rabbit appears up ahead. What do you do?
Intimate interviews with the world’s biggest thinkers.
A man wearing glasses and a navy blazer speaks while gesturing with his hands against a plain white background.
9mins
The trick that offloads intrusive thoughts so your brain can actually work
David Epstein, author of Range and Inside the Box, breaks down what's actually happening inside the brain when we multitask, and why "just focusing" is a solution that doesn't hold up to reality.
A man wearing glasses and a dark blazer gestures with his left hand while looking forward against a plain light background.
19mins
The unpopular truth about the myth of the lone genius
David Epstein argues that the myth of the lone genius is a story we tell, but the actual history of innovation is far more interesting.
A man with short blond hair and a beard wearing a black blazer over a maroon shirt sits against a plain light background, facing the camera.
21mins
The 6 triggers of aversion and how to defeat each one
In goal setting, Chris Bailey argues the problem isn't discipline; it's the system itself.
The Universe is out there, waiting for you to discover it.
unreachable Ask Ethan: What super-galactic structures are we a part of?
We live on Earth, orbiting the Sun, part of our Solar System, within the Milky Way. But what's our membership status on even larger scales?
A diagram illustrating one of the biggest mysteries: the origin of the universe, from the Big Bang and inflation to today, showing the formation of atoms, stars, galaxies, and the ongoing expansion of space. One stringy thought causes inflationary cosmologists to lose sleep
When it comes to the big question of our cosmic origins, inflation is our leading theory. But did string theory ultimately cause inflation?
A grainy black and white image shows SPHEREx comet 3I/ATLAS gleaming at the center, surrounded by stars appearing as streaks due to long exposure. Yes, interstellar comet 3I/ATLAS is older than the Solar System
Interstellar comet 3I/ATLAS has an ancient age, but not for the reason most commonly touted. These three lines of evidence are far stronger.
A dense globular cluster of stars with varying brightness in deep space, some showing blue and orange hues, appears concentrated toward the center—possibly an imposter resembling Terzan 5. Famous globular cluster Terzan 5: an imposter after all
Globular clusters are some of the most ancient cosmic relics that still survive in our Milky Way today. Famed Terzan 5 isn't one of them.
Big ideas. Thoughtful conversations. One book at a time.
Book cover for "Been There, Done That" by Greg Jackson featuring illustrations of historical figures and text highlighting the theme of overcoming challenges, including episodes like surviving a presidential smear campaign. The smear campaign that transformed presidential politics began with a billiards table
The vicious 1828 presidential campaign reveals how fake news, partisan media, and political smear tactics have shaped American democracy for two centuries.
The book cover for "Empire of Ink" by Alex Wright features an illustration of a vintage printing press with workers, bold red text, and subtle nods to the 1835 moon hoax woven into its design. The 1835 “moon hoax” that turned fake news into big business
America’s penny press transformed journalism in the 1830s, using hoaxes, sensationalism, and mass circulation to create a blueprint for modern media.
A grayscale illustration of a muscular figure with curly hair, viewed from behind, appears to be dissolving into scattered particles on a white background, evoking the somber beauty of an angel down. The literary invention that places you in the chaos of war
In his Pulitzer Prize-winning novel, Angel Down, Daniel Kraus uses a single unbroken sentence to convey the psychological toll of being a soldier in World War I.
Book cover of "Emancipation War" by Damon Root, showing a Civil War battle scene with soldiers fighting, and flags in the background. Subtitle describes the book’s focus on slavery and the Thirteenth Amendment. Before emancipation, a pivotal moment started to dismantle slavery in the U.S.
The road to emancipation began when enslaved Americans seized an opportunity for freedom and forced the nation to reckon with slavery's role in the Civil War.
Learn business from the world’s biggest thinkers.
Two scenes: Top shows climbers on an ice-covered terrain, embodying fun and success. Bottom captures an airplane in flight against a clear sky. Play it again: The causal link between fun and resilience
Fun in business is no laughing matter — it can create a golden strategic advantage and bring serious success in the long term.
Four workers assemble a large wooden tank using scaffolding and ladders at an outdoor construction site, with stacks of materials in the background. The 250-year-old company that survived by refusing to lay people off
What would your company do if it lost all its customers at once?
Book cover for "How Change Really Works" features multicolored lines radiating from a center, with one red line forming an arrow. The design reflects the dynamic process of transformation. Authors' names are displayed at the bottom. The 3 stories every leader needs to inspire successful transformations
Directives rarely inspire change. The most effective leaders use stories to make transformation memorable, resonant, and actionable.
A man stands in front of a collapsed wooden building with debris scattered around in an outdoor setting. How helping your rivals makes you harder to beat
A counterpoint to zero-sum thinking from Japan.
The world, seen sideways.
A large assembly of people in 18th-century attire gathers in an ornate hall with chandeliers, columns, and green-covered tables, engaging in discussion and debate. Why do we divide politics into left vs. right? Blame France.
Our left-vs.-right conception of politics was born in revolutionary France. The maps that followed were more sophisticated, but each carries a bias of its own.
Map showing locations and number of whale falls in the Indian Ocean, marked with orange circles; inset displays the broader region with study area highlighted in a red box. Cathedral of bones: Inside the world’s largest, deepest, and oldest whale graveyard
In a lightless canyon at the bottom of the Indian Ocean, Earth has been quietly collecting dead whales. Scientists have just discovered the archive.
A color-coded map of the United States shows state-by-state data ranging from red (lower values) to green (higher values), with a scale from 102.6K to 133.0K. Follow the money: Mapping millionaire migration across America
Since 2018, around 103,000 millionaires moved out of California — and 133,000 millionaires moved in to Florida
Children in vintage clothing play on a seesaw and gather nearby in a park setting with adults, trees, and classic playgrounds in the background. How playgrounds reinvented childhood
The modern playground was more than a place to play — it was a blueprint for a new kind of upbringing.
Where science meets the human story.
Illustration of Earth overlaid with a grid and energy types from the Kardashev Scale: Type I, II, and III, representing planetary, stellar, and galactic energy usage. A physicist explains what the Kardashev scale gets wrong
The famous framework ranks civilizations by energy use — but ignores a critical factor that can halt their progress.
A split image explores the nature of life, with a gray rock on a dark background on the left and a colored microscopic view of a cell—hinting at intelligence—in vivid detail on the right. Why organisms are more than machines
Sixty years ago, a little-known philosopher challenged how science understands life. His perspective is finding new relevance in the age of artificial intelligence.
Three planets are silhouetted against deep space with a bright red star and nebula clouds in the background. Aerial aliens: Why cloudy worlds might make detecting life easier
Astronomer Lisa Kaltenegger spoke with Big Think about how "the colors of life" could leave detectable traces on distant planets.
A cylindrical space habitat with green landscapes and rivers, viewed from inside; two moons and a bright sun-like object are visible through large windowed sections. The next great leap in evolution may lie beyond Earth
NASA’s Caleb Scharf talks with Big Think about life’s long experiment in expansion.