The full library

Every quiz, in one place

Pick a subject, choose your level, and dive in. Each quiz is written and fact-checked by hand, with an explanation after every answer.

260 quizzes · page 1 of 11

Hard
Maps & Cartography

The People Who Drew the World

Ptolemy, al-Idrisi, portolan charts and the draughtsman who straightened the Underground.

Sample question

Ptolemy's Geographia, written in the second century, was influential chiefly because it did…

10 questions 8 min Answers explained
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Hard
History

Ancient Civilizations

From Sumer to the Inca — eight questions for the serious history lover.

Sample question

Which river was central to the rise of Ancient Egypt?

8 questions 10 min Answers explained
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Medium
Geography

Rivers of the World

From the Nile to the Amazon — the great rivers that shaped where we live.

Sample question

Which river is traditionally considered the longest in the world?

10 questions 8 min Answers explained
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Medium
Technology

Inventions That Changed Everything

The breakthroughs that rewired daily life — and the people behind them.

Sample question

Who is credited with introducing the movable-type printing press to Europe around 1440?

8 questions 8 min Answers explained
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Medium
Geography

Peaks & Mountains

The roof of the world, range by range — and a few peaks that will surprise you.

Sample question

What is the highest mountain above sea level?

10 questions 8 min Answers explained
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Easy
Geography

Seas & Oceans

The blue that covers most of the planet, from the Pacific to the Dead Sea.

Sample question

What is the largest ocean on Earth?

10 questions 6 min Answers explained
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Easy
Science & Nature

The Human Body

The remarkable machine you live in, from your bones to your immune system.

Sample question

What is the largest organ of the human body?

10 questions 6 min Answers explained
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Medium
Science & Nature

The Animal Kingdom

Record-breakers, oddities and the rules that sort the living world.

Sample question

What is the largest animal ever known to have lived?

10 questions 8 min Answers explained
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Medium
Science & Nature

The Human Brain

Three pounds of tissue, eighty-six billion neurons, and the most complex object we know of.

Sample question

Which is the largest part of the brain, responsible for thought and voluntary movement?

11 questions 8 min Answers explained
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Easy
Science & Nature

Weather & Climate

Clouds, fronts, storms and the difference between a rainy day and a warming world.

Sample question

In which layer of the atmosphere does nearly all weather occur?

10 questions 6 min Answers explained
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Medium
Geography

Flags of the World

Every flag is a compressed piece of history. See how many you can read.

Sample question

Which country's flag features a single red maple leaf?

10 questions 8 min Answers explained
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Medium
Geography

Volcanoes & Earthquakes

The restless forces that build mountains, shake cities and reshape the map.

Sample question

The Earth's rigid outer shell is broken into large moving pieces called?

10 questions 8 min Answers explained
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Easy
General Knowledge

Everyday Origins

Where ordinary words and objects actually came from.

Sample question

The English word "salary" comes from the Latin word for which substance?

10 questions 7 min Answers explained
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Easy
Sports

Records, Rings & Legends

The rules, records and moments the world actually watched.

Sample question

How often are the modern Summer Olympic Games normally held?

10 questions 6 min Answers explained
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Easy
Food & Drink

From the Kitchen

What familiar dishes are made of, and where they came from.

Sample question

Which spice is harvested from the stigmas of a crocus flower?

10 questions 6 min Answers explained
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