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565 quizzes available

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Biodiversity and Ecosystems
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Nature
Hard

Biodiversity and Ecosystems

Which ecosystem produces the most oxygen, which giant fungus holds the record for the largest living being, which tree nears 5,000 years, and how long can a tardigrade survive without water? 20 questions on a living world that often outstrips fiction, from the deep sea to records of longevity.

3 min
Religions in Numbers
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Religions & Spirituality
Medium

Religions in Numbers

2.4 billion Christians, 1.9 billion Muslims (the largest Muslim country is Indonesia, not an Arab nation), 15 million Jews worldwide. 10 number-based questions on today's religious map.

2 min
May 12th Through History
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History
MediumOn This Day

May 12th Through History

On 12 May 1881, the Treaty of Bardo made Tunisia a French protectorate. In 1310, 54 Templars were burned alive under Philip the Fair. And in 1820 Florence Nightingale was born, who invented modern nursing.

2 min
May 5th Throughout History
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History
MediumOn This Day

May 5th Throughout History

On 5 May 1789, Louis XVI opened the Estates General at Versailles. In 1921, Coco Chanel launched N°5, the first perfume named after a couturier. In 1945, Mauthausen was the last camp liberated. 10 questions on this date.

2 min
French Polynesia: Culture, History & Language
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Travel & Tourism
Medium

French Polynesia: Culture, History & Language

The word "tattoo" comes from a traditional Tahitian marking that means to strike. The Tahitian alphabet is one of the shortest in the world, several Polynesian languages coexist in French Polynesia, and the traditional dance was banned by missionaries in the 19th century. 15 questions on culture, history and language.

2 min
Great Battles #2: Strategies and Tactics
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History
Expert

Great Battles #2: Strategies and Tactics

The naval turning point of the Pacific in 1942, the plan to invade France through Belgium in 1914, the largest tank battle of 1943, the 30,000 men Napoleon lost in 1812, the Mongol feigned retreat, the Inchon landing in 1950: 10 battles to identify by their decisive tactics.

3 min
Christianity: The Fundamentals
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Religions & Spirituality
Medium

Christianity: The Fundamentals

The four evangelists Matthew-Mark-Luke-John, the sacraments, the great schism between East and West, the Reformation and Christianity's global reach: 15 questions on its fundamentals.

2 min
June 29th Through History
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History
MediumOn This Day

June 29th Through History

In 1776, San Francisco is founded. In 1880, France annexes Tahiti. On 29 June 2007, the first iPhone is released. Robert Schuman is born on this day in 1886. Ten questions on this history-packed date.

2 min
August 15 Through History
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History
MediumOn This Day

August 15 Through History

On August 15, 1769, Napoleon was born in Corsica. In 1944, the Allies landed in Provence. In 1947, India gained its independence. 10 questions about this remarkable day. Can you place them all in context?

2 min
Cryptography and Computer Security
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Technology
Expert

Cryptography and Computer Security

From factoring large prime numbers to hash functions broken by collisions, from block cipher modes to Bitcoin's elliptic curves: 15 cryptography and security questions for expert level.

4 min
May 13th Through History
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History
MediumOn This Day

May 13th Through History

On 13 May 1888, the Lei Áurea freed 700,000 enslaved people in Brazil. Same date in 1917, three children saw the Virgin at Fátima. And in 1981, Mehmet Ali Ağca shot John Paul II. Ten questions on a dense date.

2 min
June 14th Through History
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History
MediumOn This Day

June 14th Through History

On June 14, 1800, Marengo saves Bonaparte. In 1919, Alcock and Brown cross the Atlantic nonstop in 16 hours. In 1985, Schengen is signed in Luxembourg. Ten questions on a busier date than it seems.

2 min