You are to find a scientifically valid article about the chances of finding life in the universe.
what is the difference between the drake equation and the seager equation?
do you think one is more useful than another? why or why not?
does either equation have an exact answer? why or why not?

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.