How did people obtain food in the paleolithic age? what were some of the problems with obtaining food this way?

Gettysburg address question. lincoln uses the images of birth and rebirth in this address. why?

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.

Countries that are neither core nations nor peripheral nations