The main way in which the railroads contributed to the end of the large buffalo herds was that "The railroad tracks were obstacles that the buffalo would not cross". It sounds silly, but the buffalo actually refused to cross the tracks for reasons that are still misunderstood.<span />
Explanation:
Primary sources are evidence about what happen in that time, the person's evidence is primary because that person was there.
Secondary are like when somebody tells you something that he heard but he wasn't there.
Answer:
vaccination
Explanation:
Louis Pasteur had been working to find a vaccine that would cure cholera in chickens. His lab assistant gave an older, weaker strain of the disease to the birds. When these birds did not die Pasteur began to rethink his ideas a came up with our current method of administering vaccinations.
Answer:
Polytheistic. Like Greek Gods, or Egyptian God's
Nissan... srry not sure if this is right
