What challenges do historians encounter when trying to define "science" during the ancient period?
cite your sources using in-text citations.
include a bibliography listing all the sources you have used.

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Northeastern china, north korea, northern japan containing coniferous forests, temperate grasslands, and agriculture, are all part of what climate zone? a. tropical desertb. desertc. humid subtropicald. humid continental

On nights when we see the new moon phase, what side of the moon are we seeing?