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Design, Engineering & Technology

How the water you flush becomes the water you drink

442,848 Views

Literature & Language

How science fiction can help predict the future

421,797 Views

Social Studies

History vs. Napoleon Bonaparte

5,672,314 Views

Thinking & Learning

The most human activity - Neil deGrasse Tyson

118,350 Views

Literature & Language

The controversial origins of the Encyclopedia

465,085 Views

Philosophy

What if you experienced every human life in history?

3,337,642 Views

Thinking & Learning

Can you steal the most powerful wand in the wizarding world?

977,085 Views

Literature & Language

What makes a poem … a poem?

4,043,226 Views

Thinking & Learning

This tool will help improve your critical thinking

6,880,632 Views

Mathematics

The paradox at the heart of mathematics: Gödel's Incompleteness Theorem

3,895,550 Views

Writing/Composition

First person vs. Second person vs. Third person

1,223,943 Views

Memory

The great brain debate

300,395 Views

Social Studies

The most important century in human history

399,460 Views

Literature & Language

What do all languages have in common?

830,078 Views

Design, Engineering & Technology

Yes, scientists are actually building an elevator to space

811,541 Views

Science & Technology

Rocks could save the world (Yes, rocks)

175,786 Views

Mathematics

Can you solve the time traveling car riddle?

807,970 Views

Psychology

Are all of your memories real?

2,077,169 Views

Thinking & Learning

The dungeon master's riddle

639,196 Views

Science & Technology

The woman who stared at the Sun

2,230,801 Views

Mathematics

Can you solve the rebel supplies riddle?

2,909,050 Views

Health

How spontaneous brain activity keeps you alive

367,919 Views

Thinking & Learning

Can you solve the world’s most evil wizard riddle?

2,612,797 Views

History

The art forger who tricked the Nazis

1,819,565 Views