Letters Archive
The Mold that Changed Medicine

How did a messy lab lead to a life-saving medicine? The tale of penicillin begins with a scientist's dirty dishes.
Read Letter
The Price Tag Puzzle

Is a $100 mug on sale for $30 really a better deal than a $30 mug? Uncover the sneaky mind trick that makes us think so!
Read Letter
The Price Puzzle: Why Costs Change
Did you know airplane tickets can cost less on the day of travel? Uncover the secrets behind ever-changing prices!
Read Letter
Tools for Thought: Expanding Your Mind's Reach

Discover how a simple checklist can supercharge your memory and become a powerful tool for your mind!
Read Letter
What if it wasn't Taylor Swift?

What if a beloved author wrote a book in secret? Uncover how a hidden identity transformed an overlooked novel into an overnight sensation.
Read Letter
Comet Tsuchinshan–ATLAS's fleeting visit

A cosmic snowball from the depths of space is making a rare visit. Can you spot this ancient traveler before it disappears for another 80,000 years?
Read Letter
Clever Hans - the horse who could do math

Imagine a horse that could do math and read German! Uncover the surprising truth behind Clever Hans and how he fooled the world.
Read Letter
How do you teach a computer?

Want to teach a computer to find hidden connections between names? Let's explore how a simple program can reveal the secrets hidden in letters!
Read Letter