In the New Library of Alexandria, amazing papyrus has been discovered, the Egyptians and the Mayans had a sort of calendar where both cultures were communicating through the stars.
Apparently the end of the world, we all know, will not be in 2012, the Egyptians also had an advanced calendar, discovered two years earlier tha the ancient Maya one.
There were some gems, collected in numerical order, are able to slow the Mayan calendar, but they were hidden in the pyramids of the Yucatan. Find them and it will help, the end of the world takes longer to appear.
A typical Jewels game for WP7 with a brief introduction.