Obscure World History
Forgotten Technologies
Cryptic Pop Culture
Mathematics in the Wild
Mythical Creatures & Legends
100

This empire, once larger than the Roman Empire, was ruled by Genghis Khan.

Mongol Empire

100

This medium stored movies before VHS and was played with a laser.

LaserDisc

100

This “purple” villain wiped out half the universe with a snap.

Thanos

100

The Fibonacci sequence often appears in these natural objects.

seashells or sunflowers

100

This horse from Greek mythology had wings and could fly.

Pegasus

200

The Cadaver Synod in 897 put this Pope on trial after his death.

Pope Formosus

200

Before floppy disks, this magnetic tape-based storage medium was used in computers.

Punch tape

200

This rapper's "death" in 1996 sparked a decades-long theory that he's alive.

Tupac Shakur

200

This mathematical concept explains why no map can avoid at least four colors.

Four Color Theorem

200

In Japanese folklore, this fox spirit can have up to 9 tails.

Kitsune

300

This country was known as Abyssinia until the mid-20th century.

Ethiopia

300

This Apple device flopped in 1993 but predicted the iPhone.

Apple Newton

300

The game Polybius is rumored to have caused hallucinations and memory loss. It supposedly appeared in arcades in which decade?

the 1980s

300

This paradox shows that a set can be both infinite and smaller than another infinite set.

Hilbert’s Hotel

300

This South American cryptid is rumored to suck the blood of livestock.

Chupacabra

400

The "Dancing Plague" of 1518 occurred in this European city.

Strasbourg

400

This 18th-century machine could “play chess” but was secretly operated by a person.

The Turk

400

This cryptic David Lynch series featured “The Black Lodge.”

Twin Peaks

400

This mathematical object has only one side and one edge.

Möbius strip

400

This creature from Mesopotamian myth is part lion, eagle, and human.

Lamassu

500

In 1859, this country "accidentally" went to war with itself.

Paraguay

500

This ancient Greek analog computer was used to predict astronomical positions.

Antikythera mechanism

500

This ARG (Alternate Reality Game) featured hidden puzzles in YouTube videos and referenced the Illuminati.

Cicada 3301

500

This unsolved problem asks whether every even number greater than 2 is the sum of two primes.

Goldbach Conjecture

500

This Icelandic Christmas cat eats children who don’t wear new clothes.

Yule Cat (Jólakötturinn)

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