A group of scientists discovers a subterranean city on Mars, losing contact with Earth. They explore three pyramids, using algebra to solve puzzles and open a sealed pyramid. Inside, they learn about an ancient civilization that moved water underground. The city itself is a giant pyramid, and solving the final puzzle reveals a lever that could bring water back to the surface.

What was the most significant discovery made by the scientists on Mars?

• A new species of plant

• A subterranean city

• A new type of mineral

• A hidden water source

What is the key to opening the sealed pyramid?

• A map found in the ruins

• A code written on the city walls

• A device discovered in the second pyramid

• A special key found in the first pyramid

How did the alien civilization make Mars inhospitable to others?

• By setting up a defense system

• By creating a toxic atmosphere

• By moving all the water underground

• By building a massive wall around the planet

What realization does the protagonist have about the city?

• It is a time capsule

• It is a spaceship

• It is a giant pyramid

• It is a map to another planet

What does the protagonist find at the end of the staircase?

• A control room

• A library of alien knowledge

• A giant lever

• A treasure chest