Which major Mexican civilization started on the Yucatán Peninsula but spread over what is now southern Mexico, Guatemala, Belize, and other parts of Central America beginning around 250 CE?

Greg goes to a high school and observes the way students talk to each other. he makes notes on the words used, the atmosphere of the school and the way the students present themselves to each other. this is an example of a( research method.

Which of the following is true of emotions? (a) a neurologically-intact baby can show at least six distinct emotions at birth. (b) the character of emotions changes as we develop cognitively. (c) basic emotions are culturally- and developmentally-based. (d) in general, adults cannot interpret infant emotions until the infants are 10 to 12 months old.

During the late 19th century, russia's settlement and development of siberia was made possible by the invention of the