Intermediate Lessons

Why do women have periods?

What are the universal human rights? - Benedetta Berti

Where did Russia come from? - Alex Gendler

The race to sequence the human genome - Tien Nguyen

Where does gold come from? - David Lunney

Can you solve the prisoner hat riddle? - Alex Gendler

What "Orwellian" really means - Noah Tavlin

A curable condition that causes blindness - Andrew Bastawrous

The treadmill's dark and twisted past - Conor Heffernan

What happens when your DNA is damaged? - Monica Menesini

What makes the Great Wall of China so extraordinary - Megan Campisi and Pen-Pen Chen

The mathematical secrets of Pascal’s triangle - Wajdi Mohamed Ratemi

When to use "me", "myself" and "I" - Emma Bryce

Do animals have language? - Michele Bishop

How misused modifiers can hurt your writing - Emma Bryce

The ancient origins of the Olympics - Armand D'Angour

Can you solve the bridge riddle? - Alex Gendler

How smart are dolphins? - Lori Marino

Could we actually live on Mars? - Mari Foroutan

A poetic experiment: Walt Whitman, interpreted by three animators - Justin Moore

What happens when continents collide? - Juan D. Carrillo

Buffalo buffalo buffalo: One-word sentences and how they work - Emma Bryce

The physics of playing guitar - Oscar Fernando Perez

Who am I? A philosophical inquiry - Amy Adkins

How does a jellyfish sting? - Neosha S Kashef

The benefits of good posture - Murat Dalkilinç

When to use apostrophes - Laura McClure

The Akune brothers: Siblings on opposite sides of war - Wendell Oshiro

The scientific origins of the Minotaur - Matt Kaplan

Where did English come from? - Claire Bowern

Inside the minds of animals - Bryan B Rasmussen

Why tragedies are alluring - David E. Rivas

How to use a semicolon - Emma Bryce

History vs. Genghis Khan - Alex Gendler

The incredible history of China's terracotta warriors - Megan Campisi and Pen-Pen Chen

How to grow a bone - Nina Tandon

The benefits of a bilingual brain - Mia Nacamulli

How X-rays see through your skin - Ge Wang

How to make a mummy - Len Bloch

Can you solve the famously difficult green-eyed logic puzzle? - Alex Gendler

Football physics: The "impossible" free kick - Erez Garty

How plants tell time - Dasha Savage

How to detect a supernova - Samantha Kuula

How people rationalize fraud - Kelly Richmond Pope

The math behind Michael Jordan’s legendary hang time - Andy Peterson and Zack Patterson

What’s the big deal with gluten? - William D. Chey

The battle of the Greek tragedies - Melanie Sirof

Will future spacecraft fit in our pockets? - Dhonam Pemba