One of the most important advancements developed by the Mayans was written language. The Mayans developed a complex system of writing, which consisted of both an alphabet, as well as symbols, which represented whole words or thoughts.
These writings were recorded in books made out of bark and plaster, as well as carved into monuments, bones and stone. Many of these writings have survived to the present, and help give us an accurate look at the Mayan's history and culture.
Imagination is a good horse to carry you over the ground--not a fluying carpet to set you free from probability.
The process of mummification in Egypt involved removing all moisture and internal organs, then drying the body and anointing it with various preserving chemicals.