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15 min
75 XP
Why Wheels Can’t Turn Together
The differential allows wheels to rotate differently
Pop Challenges
Planet
Level up your knowledge into fascinating topics. Perfect for when you're short on time but big on curiosity.
15 min
75 XP
Why Wheels Can’t Turn Together
The differential allows wheels to rotate differently
15 min
75 XP
Why Short Isn’t Fast in F1
Races are won and lost around corners
10 min
50 XP
The Skill That Schools Forgot
Listening is underestimated intelligence.
15 min
75 XP
Philosophers Against Democracy
Why thinkers like Socrates distrusted democracy?
15 min
75 XP
Too Many Choices, Too Little Happiness
When Picking Becomes a Problem
15 min
75 XP
Toilets Need to Be Reimagined
Why sanitation no longer fits the world it built
15 min
75 XP
Being Able to Flush Is a Privilege
What sanitation reveals about inequality
15 min
100 XP
The Shopkeeper’s Sign
When Politics Becomes Performance
10 min
50 XP
Does Riding Behind Someone Make Cyclists Faster?
At the elite level, physics decides.

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