37 topics of 5-minute audio lessons
Tech & Digital
How AI, software and the internet work, and how to stay safe online.
Artificial Intelligence
4 Sub topicsHow AI works, what it can and can't do, and how it is changing work and life.
Example Gists- How Machine Learning Works
- How Neural Networks Learn Through Training
- Training and Inference: Two Phases of AI Models
- How Language Models Predict the Next Word
Technology
4 Sub topicsThe technology behind the internet, devices and the tools we use every day.
Example Gists- What Happens When You Load a Web Page
- How Wi-Fi Turns Data Into Radio Waves
- From 4G to 5G: What Changed in Wireless Networks
- How Phone Cameras Work Within Tight Size Limits
Programming & Software
4 Sub topicsHow software is built, from first principles to professional engineering practice.
Example Gists- What Programming Languages Do for Us
- Big O: How Algorithms Scale with Data
- Why Software Bugs Happen
- How Git Tracks a Project's History and Teamwork
Cybersecurity & Privacy
4 Sub topicsHow attacks work, how to protect yourself, and what happens to your data.
Example Gists- Phishing: How Deception Exploits Quick Thinking
- The Three-Stage Path of a Ransomware Attack
- Social Engineering: How Attackers Manipulate People
- Password Fatigue and How Password Managers Help
Business & Money
Strategy, startups, leadership, careers, economics and your money.
Business & Strategy
4 Sub topicsClassic strategy ideas, business models and lessons from real companies.
Example Gists- Porter's Five Forces Framework
- Economic Moats: How Companies Protect Their Competitive Edge
- The Innovator's Dilemma: Why Market Leaders Fall Behind
- How Subscription Businesses Earn Through Recurring Fees
Startups & Entrepreneurship
4 Sub topicsHow founders find ideas, test them, raise money and grow.
Example Gists- Startup Idea Validation Before Building
- What MVP Really Means and Why It Matters
- Where New Companies Get Their First Money
- Product-Market Fit: Rarely a Single Breakthrough
Leadership & Management
4 Sub topicsLeading people and teams, making decisions and communicating at work.
Example Gists- Situational Leadership: Matching Your Style to Each Person
- Delegating Without Micromanaging
- Why Some Feedback Sticks and Some Fades
- Psychological Safety: Speaking Up Without Fear on a Team
Career & Productivity
4 Sub topicsGetting more done, building habits and growing your career.
Example Gists- Capture, Organize, Review: Getting Things Done
- Focus Sprints: Bounded Work Sessions
- Time Blocking: Reserving Blocks of Time for Tasks
- Deep Work vs. Shallow Work: Newport's Two Kinds of Effort
Personal Finance
4 Sub topicsBudgeting, saving, debt and planning for the future. Educational, not financial advice.
Example Gists- The Fifty Thirty Twenty Budget: Spending Framework
- Emergency Funds: Money Set Aside for the Unexpected
- Compound Interest: Earning on Your Earnings
- How a Credit Score Is Built From Your Credit Report
Investing & Markets
4 Sub topicsHow investing and financial markets work. Educational, not investment advice.
Example Gists- Stocks and Bonds: Ownership and Lending
- Why Index Funds Outpace Most Active Funds
- Diversification: Spreading Risk Across Different Investments
- Risk and Return: Weighing Gains Against Uncertainty
Economics
4 Sub topicsThe ideas behind prices, money, trade and the economy.
Example Gists- Supply and Demand: How Markets Set Prices
- Opportunity Cost: The Worth of Roads Not Taken
- GDP Explained: Origins, Calculation and What It Misses
- How Central Banks Influence the Cost of Borrowing
Marketing & Sales
4 Sub topicsHow products find customers: marketing, branding and selling.
Example Gists- The Four Ps of Marketing: Product, Price, and Place
- Finding Your Target Customer
- How Search Engines Rank Pages
- Content Marketing and Consumer Trust
Science & Health
The universe, the natural world, the human body and the mind.
Science
4 Sub topicsBig ideas in physics, chemistry and biology, and how science works.
Example Gists- Newton's Three Laws of Motion
- Relativity: Motion, Light, Time and Curved Spacetime
- Entropy: Why a Spilled Puzzle Doesn't Put Itself Together
- Why Chemical Reactions Happen: Energy, Speed and Bonds
Space & Astronomy
4 Sub topicsPlanets, stars, the universe and how we explore it.
Example Gists- How the Solar System Formed from a Collapsing Cloud
- Why Mars Appears Red: Iron Oxide and Dust
- The Life and Death of Stars
- Black Holes: From Einstein to Hawking
Engineering & How Things Work
4 Sub topicsThe machines, energy systems and structures around us, explained.
Example Gists- How Electric Motors Convert Power Into Spin
- How a Refrigerator Moves Heat Instead of Making Cold
- How Microwaves Heat Food
- From Sunlight to Socket: How Solar Panels Make Power
Health & Medicine
4 Sub topicsHow the body works, common conditions and how medicine is tested. Not medical advice.
Example Gists- Fast and Slow Defenses: How Your Immune System Responds
- How the Heart Moves Blood: Muscle, Valves, and Timing
- The Gut Microbiome: A Community of Trillions
- From Antigen to Immunity: How Vaccines Prepare the Body
Fitness & Nutrition
4 Sub topicsThe science of exercise, food and recovery. Not medical or dietary advice.
Example Gists- How Muscles Grow Larger
- Zone 2 Training: How It's Measured and Why It Matters
- VO2 Max: What It Measures and What Shapes It
- Strength Training Basics: Resistance, Routine and Recovery
Psychology & Mental Wellbeing
4 Sub topicsHow the mind works, why we think what we think, and evidence-based wellbeing.
Example Gists- Fast and Slow Thinking: The Dual Process Model
- How Memory Works: From Brief Traces to Lasting Memories
- Confirmation Bias: How Beliefs Shape What We Notice
- The Dunning-Kruger Effect: Origins, Explanation and Critics
Nature & Animals
4 Sub topicsAnimal behavior, plants and the remarkable species we share the planet with.
Example Gists- Bird Migration: Why, When and How Birds Make Round Trips
- How Honey Bees Share Information Without Words
- Crows, Octopuses and Dolphins: Different Animal Minds
- Food Chains, Food Webs, and How Energy Moves
Society & Ideas
History, philosophy, politics, the law and the world around us.
History
4 Sub topicsThe events, people and turning points that shaped the world.
Example Gists- How Egypt Built Its Pyramids: Stone, Ramps and Workers
- The Roman Republic: From Kings to Emperors
- The Silk Road: A Web of Routes Linking East and West
- The Black Death: How Plague Swept Through Europe
Philosophy & Big Ideas
4 Sub topicsTimeless questions about how to live, what is right and what we can know.
Example Gists- Socratic Questioning: Learning Through Probing Questions
- Stoicism: Control, Virtue and Caring for Others
- Plato's Cave: Shadows, Belief and Knowledge
- Utilitarianism: Judging Actions by Their Results
Politics & Government
4 Sub topicsHow governments, elections and international institutions work. Strictly non-partisan.
Example Gists- Separation of Powers: Three Branches That Check Each Other
- How a Bill Becomes Law in the United States Congress
- Presidential vs. Parliamentary Government: How They Differ
Law & Your Rights
4 Sub topicsLegal basics and everyday rights. General information, not legal advice.
Example Gists- Civil Law vs. Criminal Law: Who Sues, Proof, and Outcomes
- The Bill of Rights: Origins, Protections and Purpose
Climate & Environment
4 Sub topicsClimate science, energy and how we can live sustainably.
Example Gists- The Greenhouse Effect, Its Gases and Human Emissions
- How Scientists Measure Earth's Changing Temperature
- Carbon Budgets: Counting Emissions Under a Warming Limit
- Electric Cars, Power Grids and Lifetime Carbon Emissions
Geography & World Cultures
4 Sub topicsThe physical world, countries, cities and the cultures that make them.
Example Gists- How Mountains Form: Plates, Rifts, Volcanoes and Erosion
- Moving Plates and Why Earthquakes Happen
- What Makes a Desert: Dry Air, Mountains, and Cold
Religion & Spirituality
4 Sub topicsRespectful, factual introductions to the world's faiths and spiritual practices.
Example Gists- Buddhism: Enlightenment, Balance and the Noble Truths
- Hinduism: Ancient Roots, the Soul, and a Life of Dharma
- Judaism: One God, the Commandments, and the Weight of Action
Culture & Arts
Art, music, film, books and the way we communicate.
Arts & Design
4 Sub topicsArt history, design principles, architecture and photography.
Example Gists- The Renaissance: Rebirth in Art, Ideas and Printing
- Impressionism: Light, Loose Brushwork and New Paint Tools
- The Square in Art: Statement, Structure and Space
Music
4 Sub topicsHow music works, where genres came from and why it moves us.
Example Gists- Scales and Keys: How Music Finds Its Home Note
- Why Major and Minor Chords Feel Different
- Reading Time Signatures: Beats, Bars and Note Values
Film & Television
4 Sub topicsHow films and shows are made, told and sold.
Example Gists- Film Editing: From Separate Shots to a Whole Film
- Cinematography: How the Camera Tells a Story
- How Visual Effects Put the Unreal on Screen
Books & Literature
4 Sub topicsClassic works, genres and the craft of writing and reading.
Example Gists- Shakespeare's Words, Themes and Stage: Why He Still Matters
- The Odyssey: A Homeward Journey That Starts Midway
- Don Quixote and Why Scholars Call It the First Modern Novel
Language & Communication
4 Sub topicsLearning languages, how language works, writing clearly and speaking well.
Example Gists- How Babies Learn Language: From Listening to First Sentences
- Spaced Repetition: How Widening Reviews Help Words Stick
- Why English Spelling Is Odd: Shifts, Printing, Borrowing
Life & Leisure
Family, relationships, food, travel, sports and fun facts.
Parenting & Family
4 Sub topicsChild development, parenting approaches and family life, grounded in research.
Example Gists- Stages, Domains and Pace: How Child Development Is Described
- How a Baby's Brain Builds and Prunes Its Wiring
- Authoritative and Authoritarian Parenting Compared
Relationships & Social Skills
4 Sub topicsCommunication, friendship, love and handling conflict.
Example Gists- NVC: Observations, Feelings, Needs and Requests
- Learning Small Talk: Topics, Questions and Listening
- How Adult Friendships Form and What Can Get in the Way
Food & Cooking
4 Sub topicsThe science of cooking, core techniques and the stories behind what we eat.
Example Gists- The Maillard Reaction: How Heat Browns and Flavors Food
- How Salt Makes Sweet and Savory Flavors Stand Out
- How Microbes Ferment Food: Sourdough, Kombucha and Chocolate
Travel
4 Sub topicsSmarter travel, remarkable places and the history of getting around.
Example Gists- How Airlines Use Price Tiers and Fare Codes to Set Fares
- Jet Lag: Why Your Body Clock Lags Behind Your Flight
- Travel Hacking: Earning and Redeeming Points and Miles
Sports
4 Sub topicsRules, strategy, science and history of the world's sports.
Example Gists- How the Offside Rule Works in Soccer
- Cricket Basics: The Pitch, Scoring, Overs and Match Formats
- How the Three-Point Line Changed Basketball Strategy
Fun Facts
5 Sub topicsSurprising, true and well-sourced facts about animals, the human body, history and everyday things, plus popular myths put to the test.
Example Gists- How Wombats Make Cube-Shaped Droppings
- Why Flamingos Turn Pink: Pigments From Their Food
- Why Cats Can't Taste Sweetness: A Genetic Detective Story
- Why You're Taller in the Morning: Spinal Discs and Gravity
Start learning in five minutes
Choose 3 to 5 topics, press play, and get a little wiser every day.