TAKING INTO ACCOUNT THE CHARACTERISTICS OF THE DIFFERENT ERA GEOLOGICAL AND THE MOMENT IN WHICH MAN APPEARS,
CONSIDERS MAN'S SURVIVAL POSSIBLE IF HAD
ARISED IN ANOTHER GEOLOGICAL ERA? WHY?

Predict how the transcontinental railroad will make a difference in the civil war. now, research the inventions of the 19th century. tell what other inventions of the 19th century will change the way people see and remember the war? why?