Aztecs and Mayans compare+contrast.

I have a 3 page expository essay due Friday. And I chose my topic as the aztecs and mayans, and i need to compare and contrast them.
Can anyone give me an ideas?
I already started my thesis/intro paragraph.
So far I have:


Aztecs Difference:
Have god-man ceremony. ( Eat the sacrifice after being cut up. )
Rip the human sacrifice's heart out of their chest.

Mayan Difference:
Experts in mathematics and astronomy.
Developed accurate calendars. (One 260 day religious calendar, One 360 Day date Calendar.)

Similarities:
Human Sacrifice.
Ancient Mexico tribes.


Anyone have any other ideas?

they're both gay.

Coak, that wasn't neither helpful nor funny...

Try going to Wikipedia, you'll have some luck there. Theres a lot of information on both there.