Library
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.
New on Acadru
10 min
50 XP
The Weird Economics of $100,000 Watches
Why higher prices make some things irresistible?
10 mins
50 XP
The Weird Economics of $100,000 Watches
Why higher prices make some things irresistible?
10 min
50 XP
Order Without a Leader
Thousands of ants, one collective mind.
10 mins
50 XP
Order Without a Leader
Thousands of ants, one collective mind.
15 min
75 XP
Brains Are Optional. Problem-Solving Is Universal
Brainless Slime Mould Beats Humans
15 mins
75 XP
Brains Are Optional. Problem-Solving Is Universal
Brainless Slime Mould Beats Humans
15 min
75 XP
How Banks Create Money from Nothin’
Money multiplies—even when no one prints it.
15 mins
75 XP
How Banks Create Money from Nothin’
Money multiplies—even when no one prints it.
10 min
50 XP
The Jabulani Ball Bent Physics
How aerodynamics turned the Jabulani infamous.
10 mins
50 XP
The Jabulani Ball Bent Physics
How aerodynamics turned the Jabulani infamous.
10 min
50 XP
Without Coffee, We’d All Be Drunk?
How one drink sobered up history and fueled the modern world.
10 mins
50 XP
Without Coffee, We’d All Be Drunk?
How one drink sobered up history and fueled the modern world.
15 min
75 XP
Coal Was Retiring, Tech Revived It
Can clean energy really keep up with our clicks?
15 mins
75 XP
Coal Was Retiring, Tech Revived It
Can clean energy really keep up with our clicks?
15 min
75 XP
Is Real Friendship Dead?
Your brain wants friends, not followers.
15 mins
75 XP
Is Real Friendship Dead?
Your brain wants friends, not followers.
15 min
75 XP
Weaponizing Water: Rivers at Gunpoint
The world’s next wars may not be over oil, but over rivers.
15 mins
75 XP
Weaponizing Water: Rivers at Gunpoint
The world’s next wars may not be over oil, but over rivers.
10 min
50 XP
The Mackerel Economy
No Money? No Problem. A Fish Became Prison Currency
10 mins
50 XP
The Mackerel Economy
No Money? No Problem. A Fish Became Prison Currency
Popular on Acadru
15 min
75 XP
Is Real Friendship Dead?
Your brain wants friends, not followers.
15 mins
75 XP
Is Real Friendship Dead?
Your brain wants friends, not followers.
10 min
50 XP
Order Without a Leader
Thousands of ants, one collective mind.
10 mins
50 XP
Order Without a Leader
Thousands of ants, one collective mind.
15 min
75 XP
Brains Are Optional. Problem-Solving Is Universal
Brainless Slime Mould Beats Humans
15 mins
75 XP
Brains Are Optional. Problem-Solving Is Universal
Brainless Slime Mould Beats Humans
10 min
50 XP
Without Coffee, We’d All Be Drunk?
How one drink sobered up history and fueled the modern world.
10 mins
50 XP
Without Coffee, We’d All Be Drunk?
How one drink sobered up history and fueled the modern world.
15 min
75 XP
Weaponizing Water: Rivers at Gunpoint
The world’s next wars may not be over oil, but over rivers.
15 mins
75 XP
Weaponizing Water: Rivers at Gunpoint
The world’s next wars may not be over oil, but over rivers.
10 min
50 XP
The Weird Economics of $100,000 Watches
Why higher prices make some things irresistible?
10 mins
50 XP
The Weird Economics of $100,000 Watches
Why higher prices make some things irresistible?
10 min
50 XP
The Mackerel Economy
No Money? No Problem. A Fish Became Prison Currency
10 mins
50 XP
The Mackerel Economy
No Money? No Problem. A Fish Became Prison Currency
15 min
75 XP
How Banks Create Money from Nothin’
Money multiplies—even when no one prints it.
15 mins
75 XP
How Banks Create Money from Nothin’
Money multiplies—even when no one prints it.
15 min
75 XP
Coal Was Retiring, Tech Revived It
Can clean energy really keep up with our clicks?
15 mins
75 XP
Coal Was Retiring, Tech Revived It
Can clean energy really keep up with our clicks?
10 min
50 XP
The Jabulani Ball Bent Physics
How aerodynamics turned the Jabulani infamous.
10 mins
50 XP
The Jabulani Ball Bent Physics
How aerodynamics turned the Jabulani infamous.
All Pop Challenges
10 min
50 XP
The Weird Economics of $100,000 Watches
Why higher prices make some things irresistible?
10 mins
50 XP
The Weird Economics of $100,000 Watches
Why higher prices make some things irresistible?
10 min
50 XP
The Jabulani Ball Bent Physics
How aerodynamics turned the Jabulani infamous.
10 mins
50 XP
The Jabulani Ball Bent Physics
How aerodynamics turned the Jabulani infamous.
10 min
50 XP
The Mackerel Economy
No Money? No Problem. A Fish Became Prison Currency
10 mins
50 XP
The Mackerel Economy
No Money? No Problem. A Fish Became Prison Currency
10 min
50 XP
Order Without a Leader
Thousands of ants, one collective mind.
10 mins
50 XP
Order Without a Leader
Thousands of ants, one collective mind.
15 min
75 XP
Coal Was Retiring, Tech Revived It
Can clean energy really keep up with our clicks?
15 mins
75 XP
Coal Was Retiring, Tech Revived It
Can clean energy really keep up with our clicks?
15 min
75 XP
Is Real Friendship Dead?
Your brain wants friends, not followers.
15 mins
75 XP
Is Real Friendship Dead?
Your brain wants friends, not followers.
10 min
50 XP
Without Coffee, We’d All Be Drunk?
How one drink sobered up history and fueled the modern world.
10 mins
50 XP
Without Coffee, We’d All Be Drunk?
How one drink sobered up history and fueled the modern world.
15 min
75 XP
Brains Are Optional. Problem-Solving Is Universal
Brainless Slime Mould Beats Humans
15 mins
75 XP
Brains Are Optional. Problem-Solving Is Universal
Brainless Slime Mould Beats Humans
15 min
75 XP
How Banks Create Money from Nothin’
Money multiplies—even when no one prints it.
15 mins
75 XP
How Banks Create Money from Nothin’
Money multiplies—even when no one prints it.
15 min
75 XP
Weaponizing Water: Rivers at Gunpoint
The world’s next wars may not be over oil, but over rivers.
15 mins
75 XP
Weaponizing Water: Rivers at Gunpoint
The world’s next wars may not be over oil, but over rivers.