By means of excavations and the study of the areas that lived in as well as the careful study of there remains to study there health and if there where identifiable diseases that they suffered and other things of this nature <span />
Answer:
The Mayan writing system is different because, the ancient Maya system of writing has around 800 signs, and it's a mixture of logograms and phonetic signs.
Explanation:
Benjamin Franklin proved himself to have in Philadelphia was Writing
The lower part of the stratosphere protects earth from metoroides because the temperature drops to -100 degrees