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Thinking & Learning

Can you solve a mystery before Sherlock Holmes?

628,788 Views

Thinking & Learning

The dungeon master's riddle

636,494 Views

Health

How spontaneous brain activity keeps you alive

367,895 Views

Mathematics

Can you solve the time traveling car riddle?

807,152 Views

Science & Technology

The woman who stared at the sun

2,230,640 Views

Psychology

Are all of your memories real?

2,075,593 Views

Mathematics

Can you solve the rebel supplies riddle?

2,907,890 Views

Science & Technology

Rocks could save the world (Yes, rocks)

173,037 Views

Design, Engineering & Technology

Yes, scientists are actually building an elevator to space

811,371 Views

Literature & Language

What do all languages have in common?

829,657 Views

Thinking & Learning

This tool will help improve your critical thinking

6,870,520 Views

Writing/Composition

First person vs. Second person vs. Third person

1,222,717 Views

Literature & Language

What makes a poem … a poem?

4,038,002 Views

Mathematics

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

3,894,072 Views

Thinking & Learning

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

976,166 Views

Social Studies

The most important century in human history

398,717 Views

Memory

The great brain debate

300,344 Views

Literature & Language

The controversial origins of the Encyclopedia

464,960 Views

Philosophy

What if you experienced every human life in history?

3,326,209 Views

Thinking & Learning

The most human activity - Neil deGrasse Tyson

118,331 Views

Social Studies

History vs. Napoleon Bonaparte

5,671,037 Views

Literature & Language

How science fiction can help predict the future

421,368 Views

Mathematics

Can you solve the fortress riddle?

1,470,681 Views

Life Sciences

Why elephants never forget

8,885,722 Views