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All Pop Challenges

Learn bite-sized concepts quickly and test your
knowledge with fun, easy tasks. Perfect for when
you're short on time but big on curiosity.

How Prime Numbers Protect Your Passwords
15 mins
100 XP
How Prime Numbers Protect Your Passwords
Easy to lock, impossible to crack—unless you break math.
Stateless: No Country, No Rights
15 mins
75 XP
Stateless: No Country, No Rights
Living with no citizenship in any nation.
Trading Sneakers Like Stocks?
15 mins
100 XP
Trading Sneakers Like Stocks?
StockX says yes! Sneaker resale
The Human Cost of Sugar Trade
15 mins
75 XP
The Human Cost of Sugar Trade
Sugar came with a brutal price tag: slavery.
Plot Twist: Disney vs. Ghibli
10 mins
50 XP
Plot Twist: Disney vs. Ghibli
Two studios shape the world of animation differently.
Geoengineering Governance
15 mins
100 XP
Geoengineering Governance
The Ethics & Politics of Geoengineering
Are You a Climate Strategist?
10 mins
50 XP
Are You a Climate Strategist?
Can You Choose the Right Strategy?
The Art of Pricing Art
10 mins
50 XP
The Art of Pricing Art
Paying for paint, or the story?
Your Gut Has a Brain
5 mins
50 XP
Your Gut Has a Brain
Meet the brain in your belly——and it talks back!
Net Zero or Net Scam?
15 mins
100 XP
Net Zero or Net Scam?
The Billion-Dollar Carbon Scam!
The Vortex Hack
15 mins
100 XP
The Vortex Hack
How F1 Engineers Turn Turbulence into Speed
Tattoos: Culture or Counter-Culture?
10 mins
50 XP
Tattoos: Culture or Counter-Culture?
Once sacred, branded sinful, now dubbed stylish.
How Does Handiwork Fuel Happiness?
15 mins
100 XP
How Does Handiwork Fuel Happiness?
Digging, knitting, kneading boost dopamine and resilience.
Lipstick Sales, Recession Tales
10 mins
50 XP
Lipstick Sales, Recession Tales
From 9/11 to COVID, lipstick sales break the rules of recession!
Same Box, Smaller Bite?
15 mins
75 XP
Same Box, Smaller Bite?
Less product, same price—design disguises it.
The Chemistry of Hero Tech
10 mins
50 XP
The Chemistry of Hero Tech
Avengers: Superpowers meet supermaterials
Do Wars Have Rules?
5 mins
50 XP
Do Wars Have Rules?
Geneva Conventions, banned weapons, and what happens when the rules get broken.
Why Do We Obey Wicked Leaders?
10 mins
75 XP
Why Do We Obey Wicked Leaders?
What makes ordinary people follow cruel orders?
Solar Storm Hit: Satellites Fall
15 mins
100 XP
Solar Storm Hit: Satellites Fall
How Solar Storms Destroy Satellites
Designed to Hook
15 mins
75 XP
Designed to Hook
Why your phone is harder to put down than you think
Design Like Da Vinci
15 mins
75 XP
Design Like Da Vinci
The Golden Ratio in Art & Creativity
Why Wars Are Getting Weirder?
15 mins
75 XP
Why Wars Are Getting Weirder?
From civil collapse to cyberattacks, the battlefield has no rules anymore.
E-Athletes Train Like Olympians
15 mins
75 XP
E-Athletes Train Like Olympians
Gaming has rules, coaches, drills—and burnout.
Investing in e-Sports Athletes
15 mins
100 XP
Investing in e-Sports Athletes
E-sports gets major-league level financial backing.
Who Knew Avoiding War Could Start One?
10 mins
100 XP
Who Knew Avoiding War Could Start One?
Inside the decisions that lead to war.
Sleep on It
5 mins
50 XP
Sleep on It
The Brain’s Most Underrated Power Move
What Makes You a Citizen?
15 mins
75 XP
What Makes You a Citizen?
Nations decide who belongs. And who doesn't.
Fibonacci - Nature's Algorithm
10 mins
50 XP
Fibonacci - Nature's Algorithm
Nature isn’t guessing—it’s computing.
Do Meaningless Tattoos Have Meaning?
15 mins
100 XP
Do Meaningless Tattoos Have Meaning?
The rise of absurd tattoos.
Can Origami Out-Engineer Steel?
15 mins
75 XP
Can Origami Out-Engineer Steel?
Ancient folds. Modern strength.
Build-A-Nation
10 mins
50 XP
Build-A-Nation
Myths, media, and wars built nations.
The Jordan Effect
15 mins
75 XP
The Jordan Effect
How $200 shoes sell themselves?
Turbulence UnTamed
15 mins
75 XP
Turbulence UnTamed
Why Scientists Still Can’t Solve This
Engineering the Sun’s Shadow
15 mins
75 XP
Engineering the Sun’s Shadow
Deflect the Rays, Cool the Globe?
Designers Know What You’ll Click
15 mins
100 XP
Designers Know What You’ll Click
Psychology meets computer interfaces
Crack the Code – The Math That Could Break RSA
15 mins
100 XP
Crack the Code – The Math That Could Break RSA
Can modular math break the world’s strongest locks?
Art as Therapy?
10 mins
50 XP
Art as Therapy?
Art rebuilds neural connections for the mind & body.
Japan: Soft Power, Strong Diplomacy
15 mins
100 XP
Japan: Soft Power, Strong Diplomacy
Influence by Charm, Not Control
E-Sports' Achilles Wrist
10 mins
50 XP
E-Sports' Achilles Wrist
Carpal Tunnel Syndrome is ending esports careers.
How to Cool a City?
15 mins
100 XP
How to Cool a City?
Singapore’s mission to outsmart urban heat!
Is Super Strength Possible?
10 mins
50 XP
Is Super Strength Possible?
The physics problem with being too strong
Would You Ever Become a Bully?
10 mins
50 XP
Would You Ever Become a Bully?
Could group think turn you into a bully?
How Captain America Got Super?
10 mins
50 XP
How Captain America Got Super?
Can We Build a Real Super Soldier?
How Pilots Predict Turbulence?
10 mins
50 XP
How Pilots Predict Turbulence?
When the skies get rough, pilots get smarter.
New Twist or Old Taste?
15 mins
100 XP
New Twist or Old Taste?
Copying Coke Classic let Zero innovate.
Slavery Powered Progress
10 mins
50 XP
Slavery Powered Progress
The Industrialization Revolution's “invisible capital” was slavery profits.
Art As A Tax Shield
15 mins
75 XP
Art As A Tax Shield
Elegant décor or financial escape hatch?
Emotional Connection Through Design
15 mins
100 XP
Emotional Connection Through Design
Visceral. Behavioral. Reflective.
Can Economic Recoveries Spell UwU?
15 mins
100 XP
Can Economic Recoveries Spell UwU?
Recovery graphs can zigzag into letters!
Can Free Cash End Poverty?
10 mins
50 XP
Can Free Cash End Poverty?
Direct cash transfers to the poor can change their futures.
Beauty: Hardwired in the Brain?
15 mins
75 XP
Beauty: Hardwired in the Brain?
Evolution taught us that beauty is survival.
Spotting Invisible Problems
10 mins
50 XP
Spotting Invisible Problems
The biggest design problems? The ones no one sees.
Can You Be Conditioned Like Pavlov’s Dogs?
10 mins
50 XP
Can You Be Conditioned Like Pavlov’s Dogs?
How past experiences shape habits, fears, and emotions!
Welfare Help or Hidden Trap?
15 mins
75 XP
Welfare Help or Hidden Trap?
Intended to aid; structured to confine.
Updated, Yet Unchanged
10 mins
50 XP
Updated, Yet Unchanged
Small changes, stronger sales surge.
Do Subsidies Reward the Richest?
15 mins
100 XP
Do Subsidies Reward the Richest?
Big (tax) breaks for the big (rich) fish.
Cosplay to Combat
15 mins
75 XP
Cosplay to Combat
What flies off the shelves isn’t always harmless fun.
Why Does Poverty Exist?
10 mins
50 XP
Why Does Poverty Exist?
Poverty traps bar the way to wealth.
Fold It Right—Or Nothing Works
15 mins
100 XP
Fold It Right—Or Nothing Works
Master the 4 rules. Miss one—and you might crash a satellite.
Aurora Incoming!
10 mins
50 XP
Aurora Incoming!
Explained by Space Weather
Prime Numbers in Nature
10 mins
50 XP
Prime Numbers in Nature
Nature’s secret code: Can bugs do math?
The $100 Sneaker Breakdown
10 mins
50 XP
The $100 Sneaker Breakdown
Where does your $100 really go?
Gold: Born in Violence
10 mins
50 XP
Gold: Born in Violence
That gold ring? Forged in a star smash.
Who Wants a Piece of Greenland?
15 mins
75 XP
Who Wants a Piece of Greenland?
Why Economies Love Natural Resources?
Can We Dodge Recessions?
15 mins
75 XP
Can We Dodge Recessions?
No economy avoids slow-downs for long.
Can Skirts Predict Stocks?
10 mins
50 XP
Can Skirts Predict Stocks?
Fashion trends + financial trends = a strange math.
The 7 Deadly Sins of Greenwashing!
10 mins
50 XP
The 7 Deadly Sins of Greenwashing!
The Greenwashing Tricks Businesses Use to Fool You!
Can You Hack the Weather?
10 mins
50 XP
Can You Hack the Weather?
Cool the Planet-Rewriting Earth’s Weather Code
Red = React
10 mins
50 XP
Red = React
This color doesn’t wait for logic.
NFTs: The Future of Art Investment?
15 mins
100 XP
NFTs: The Future of Art Investment?
Pixels as assets—can hype hold value?
Green Nudges – Habit-Changing Design
10 mins
50 XP
Green Nudges – Habit-Changing Design
Not all eco-fixes are hardware—some are interface.
Ordinary People, Extraordinary Evil?
15 mins
100 XP
Ordinary People, Extraordinary Evil?
Can good people do terrible things?
Outpaced by Technology
15 mins
100 XP
Outpaced by Technology
Can human wisdom keep up with god-like tech?
Not Buying Boxers? Economists Worry!
10 mins
50 XP
Not Buying Boxers? Economists Worry!
Bad underwear sales mean big financial trouble.
Forced Labor Or Slavery?
15 mins
100 XP
Forced Labor Or Slavery?
To remedy Nazi job crises, POWs were enslaved.
Origami for Outer Space
10 mins
50 XP
Origami for Outer Space
How paper-folding is helping rockets reach the stars!
What is Greenwashing?
5 mins
50 XP
What is Greenwashing?
Not Everything "Green" is Clean!
Scrolling in the Skinner Box
10 mins
50 XP
Scrolling in the Skinner Box
You’re not just scrolling—you’re pressing a digital lever.
Schools That Float?
15 mins
75 XP
Schools That Float?
When Floods Rise, These Schools Adapt!
Tattoos: The Immune System's Challenge
15 mins
100 XP
Tattoos: The Immune System's Challenge
Macrophages lock tattoos in for life.
Why Isn't Earth Toasted?
15 mins
75 XP
Why Isn't Earth Toasted?
Saved from Solar Flares by Magnetism

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