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
Why Wars Are Getting Weirder?
From civil collapse to cyberattacks, the battlefield has no rules anymore.
15 mins
75 XP
Who Wants a Piece of Greenland?
Why Economies Love Natural Resources?
15 mins
100 XP
Investing in e-Sports Athletes
E-sports gets major-league level financial backing.
10 mins
50 XP
Origami for Outer Space
How paper-folding is helping rockets reach the stars!
15 mins
75 XP
Turbulence UnTamed
Why Scientists Still Can’t Solve This
10 mins
50 XP
Can You Hack the Weather?
Cool the Planet-Rewriting Earth’s Weather Code
10 mins
50 XP
Not Buying Boxers? Economists Worry!
Bad underwear sales mean big financial trouble.
10 mins
50 XP
The $100 Sneaker Breakdown
Where does your $100 really go?
15 mins
75 XP
Why Isn't Earth Toasted?
Saved from Solar Flares by Magnetism
10 mins
75 XP
Why Do We Obey Wicked Leaders?
What makes ordinary people follow cruel orders?
Popular on Acadru
10 mins
50 XP
The $100 Sneaker Breakdown
Where does your $100 really go?
15 mins
75 XP
Why Wars Are Getting Weirder?
From civil collapse to cyberattacks, the battlefield has no rules anymore.
15 mins
75 XP
Who Wants a Piece of Greenland?
Why Economies Love Natural Resources?
10 mins
75 XP
Why Do We Obey Wicked Leaders?
What makes ordinary people follow cruel orders?
10 mins
50 XP
Not Buying Boxers? Economists Worry!
Bad underwear sales mean big financial trouble.
15 mins
75 XP
Why Isn't Earth Toasted?
Saved from Solar Flares by Magnetism
10 mins
50 XP
Origami for Outer Space
How paper-folding is helping rockets reach the stars!
15 mins
100 XP
Investing in e-Sports Athletes
E-sports gets major-league level financial backing.
10 mins
50 XP
Can You Hack the Weather?
Cool the Planet-Rewriting Earth’s Weather Code
15 mins
75 XP
Turbulence UnTamed
Why Scientists Still Can’t Solve This
All Pop Challenges
10 mins
50 XP
Can You Hack the Weather?
Cool the Planet-Rewriting Earth’s Weather Code
15 mins
75 XP
Why Wars Are Getting Weirder?
From civil collapse to cyberattacks, the battlefield has no rules anymore.
10 mins
50 XP
Not Buying Boxers? Economists Worry!
Bad underwear sales mean big financial trouble.
15 mins
100 XP
Investing in e-Sports Athletes
E-sports gets major-league level financial backing.
15 mins
75 XP
Why Isn't Earth Toasted?
Saved from Solar Flares by Magnetism
10 mins
50 XP
Origami for Outer Space
How paper-folding is helping rockets reach the stars!
10 mins
75 XP
Why Do We Obey Wicked Leaders?
What makes ordinary people follow cruel orders?
15 mins
75 XP
Who Wants a Piece of Greenland?
Why Economies Love Natural Resources?
10 mins
50 XP
The $100 Sneaker Breakdown
Where does your $100 really go?
15 mins
75 XP
Turbulence UnTamed
Why Scientists Still Can’t Solve This