Jack and Annie arrived the very cold place like their teeth were chattering.

The title of the open book was “Life in Ice Age”.

Jack wanted to go home to prepare warmer clothes, but he couldn’t.

Because Jack and Annie could find the Pennsylvania book only when they completed their mission.

They started down the rope ladder to find the third M thing.

And then they saw 4 people who held the spears on the cliff.

Jack found the information about those people in the book.

They were Cro-Magnons who lived in the caves and they sometimes hunted together.

Jack and Annie hurried to find the M thing while the Cro-Magnons were hunting.

But the wind was biting, so they tried to find warmer place like the cave.

They could find the cave on the cliff and stepped into there very carefully.

Jack was reading the Ice Age book while Annie was looking around the cave.

Annie knew that the cave was filled with bones.

And Jack knew that the great cave bears lived in the cave and the cave was filled with their ancestors’ bones.