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
15 mins
75 XP
Eradicate Killer Cats?
The Feral Cat Dilemma in Hawaii
15 mins
75 XP
Eradicate Killer Cats?
The Feral Cat Dilemma in Hawaii
10 mins
50 XP
Love Is Brainwork, Not Heartwork
The heart gets the credit, but the brain does the work.
10 mins
50 XP
Love Is Brainwork, Not Heartwork
The heart gets the credit, but the brain does the work.
15 mins
50 XP
The Bikini Was Born in a Nuclear Test
When superpowers race, small nations pay the price.
15 mins
50 XP
The Bikini Was Born in a Nuclear Test
When superpowers race, small nations pay the price.
15 mins
75 XP
From Duct Tape to Drone Brigades
How $500 flying cameras became Ukraine’s front-line tank killers
15 mins
75 XP
From Duct Tape to Drone Brigades
How $500 flying cameras became Ukraine’s front-line tank killers
15 mins
75 XP
The Great Sand Heist
A global resource war…hiding in plain sight.
15 mins
75 XP
The Great Sand Heist
A global resource war…hiding in plain sight.
15 mins
75 XP
AI 2027 – Saved by AI, Replaced by AI
A step-by-step forecast of how AI takes over!
15 mins
75 XP
AI 2027 – Saved by AI, Replaced by AI
A step-by-step forecast of how AI takes over!
15 mins
75 XP
Why Dubai Doesn’t Use Its Own Sand?
The sand looks right. The science says no.
15 mins
75 XP
Why Dubai Doesn’t Use Its Own Sand?
The sand looks right. The science says no.
15 mins
75 XP
Worldbuilding Pokémon
What if your favorite game creatures had to obey biology?
15 mins
75 XP
Worldbuilding Pokémon
What if your favorite game creatures had to obey biology?
10 mins
50 XP
More Than Data. It’s a Story.
When numbers meet visuals, they demand attention.
10 mins
50 XP
More Than Data. It’s a Story.
When numbers meet visuals, they demand attention.
10 mins
50 XP
What Keeps Skyscrapers Up
Gravity pulls. Wind pushes. Engineers fight back.
10 mins
50 XP
What Keeps Skyscrapers Up
Gravity pulls. Wind pushes. Engineers fight back.
Popular on Acadru
10 mins
50 XP
Love Is Brainwork, Not Heartwork
The heart gets the credit, but the brain does the work.
10 mins
50 XP
Love Is Brainwork, Not Heartwork
The heart gets the credit, but the brain does the work.
15 mins
75 XP
Eradicate Killer Cats?
The Feral Cat Dilemma in Hawaii
15 mins
75 XP
Eradicate Killer Cats?
The Feral Cat Dilemma in Hawaii
15 mins
50 XP
The Bikini Was Born in a Nuclear Test
When superpowers race, small nations pay the price.
15 mins
50 XP
The Bikini Was Born in a Nuclear Test
When superpowers race, small nations pay the price.
10 mins
50 XP
More Than Data. It’s a Story.
When numbers meet visuals, they demand attention.
10 mins
50 XP
More Than Data. It’s a Story.
When numbers meet visuals, they demand attention.
15 mins
75 XP
AI 2027 – Saved by AI, Replaced by AI
A step-by-step forecast of how AI takes over!
15 mins
75 XP
AI 2027 – Saved by AI, Replaced by AI
A step-by-step forecast of how AI takes over!
15 mins
75 XP
Why Dubai Doesn’t Use Its Own Sand?
The sand looks right. The science says no.
15 mins
75 XP
Why Dubai Doesn’t Use Its Own Sand?
The sand looks right. The science says no.
15 mins
75 XP
The Great Sand Heist
A global resource war…hiding in plain sight.
15 mins
75 XP
The Great Sand Heist
A global resource war…hiding in plain sight.
15 mins
75 XP
From Duct Tape to Drone Brigades
How $500 flying cameras became Ukraine’s front-line tank killers
15 mins
75 XP
From Duct Tape to Drone Brigades
How $500 flying cameras became Ukraine’s front-line tank killers
15 mins
75 XP
Worldbuilding Pokémon
What if your favorite game creatures had to obey biology?
15 mins
75 XP
Worldbuilding Pokémon
What if your favorite game creatures had to obey biology?
10 mins
50 XP
What Keeps Skyscrapers Up
Gravity pulls. Wind pushes. Engineers fight back.
10 mins
50 XP
What Keeps Skyscrapers Up
Gravity pulls. Wind pushes. Engineers fight back.
All Pop Challenges
15 mins
75 XP
Eradicate Killer Cats?
The Feral Cat Dilemma in Hawaii
15 mins
75 XP
Eradicate Killer Cats?
The Feral Cat Dilemma in Hawaii
15 mins
75 XP
Why Dubai Doesn’t Use Its Own Sand?
The sand looks right. The science says no.
15 mins
75 XP
Why Dubai Doesn’t Use Its Own Sand?
The sand looks right. The science says no.
15 mins
75 XP
Worldbuilding Pokémon
What if your favorite game creatures had to obey biology?
15 mins
75 XP
Worldbuilding Pokémon
What if your favorite game creatures had to obey biology?
15 mins
50 XP
The Bikini Was Born in a Nuclear Test
When superpowers race, small nations pay the price.
15 mins
50 XP
The Bikini Was Born in a Nuclear Test
When superpowers race, small nations pay the price.
10 mins
50 XP
More Than Data. It’s a Story.
When numbers meet visuals, they demand attention.
10 mins
50 XP
More Than Data. It’s a Story.
When numbers meet visuals, they demand attention.
10 mins
50 XP
What Keeps Skyscrapers Up
Gravity pulls. Wind pushes. Engineers fight back.
10 mins
50 XP
What Keeps Skyscrapers Up
Gravity pulls. Wind pushes. Engineers fight back.
10 mins
50 XP
Love Is Brainwork, Not Heartwork
The heart gets the credit, but the brain does the work.
10 mins
50 XP
Love Is Brainwork, Not Heartwork
The heart gets the credit, but the brain does the work.
15 mins
75 XP
AI 2027 – Saved by AI, Replaced by AI
A step-by-step forecast of how AI takes over!
15 mins
75 XP
AI 2027 – Saved by AI, Replaced by AI
A step-by-step forecast of how AI takes over!
15 mins
75 XP
The Great Sand Heist
A global resource war…hiding in plain sight.
15 mins
75 XP
The Great Sand Heist
A global resource war…hiding in plain sight.
15 mins
75 XP
From Duct Tape to Drone Brigades
How $500 flying cameras became Ukraine’s front-line tank killers
15 mins
75 XP
From Duct Tape to Drone Brigades
How $500 flying cameras became Ukraine’s front-line tank killers