Thresholds
Geography
Explosive
All Greek to Me
100

Person who typically carries the bride over the house threshold.

What is husband or groom?

100

Lifeline of Egypt

What is the Nile River?

100

Molten rock

What is lava?

100
Greek trading partners with the Minoans.

Who were the Mycenaeans?

200

First threshold in the history of Earth.

What is the Big Bang?

200

Large body of water surrounding Greek islands.

What is the Aegean Sea?

200

Large wave created by volcanic eruption.

What is a tsunami?

200

Leader of Minoan civilisation according to legend.

Who was King Minos?

300
Threshold in human history that created permanent societies. 

What is the agricultural revolution?

300

Mysterious head statues line the coastline.

What is Easter Island?

300

Island in the Mediterranean Sea destroyed by volcanic eruption. 

Where is Thera?

300

Puzzling hallways beneath the palace.

What is the labyrinth? 

400

Major event pushing humans into the modern world.

What is the Industrial Revolution?

400

Geographic feature providing protection but also difficulty in traversing across.

What are mountains/desert?

400

Year of volcanic eruption that destroyed Thera.

When is circa 1650 BCE

400

Early Minoan language not yet deciphered.

What is Linear A?

500

Next threshold for human history that will be out of this world.

What is space colonisation?

500
Region that follows the Tigris and Euphrates rivers.

What is the fertile crescent?

500

Island of the famous Krakatau eruption in 1883.

Where is Indonesia?
500

Famous city of the Trojan Horse.

Where is Troy?