Who made contributions to technology that helped the settlers in the West? a. Frederick Jackson
b. Charlie O' Kieffe
c. Stephen Long
d. John Deere

would be the one having to do with paine talking about how the colonies are so "close" to independence anyway, since he viewed that only rational next step at this point being revolution.

after the success of the sputnik launch in 1957, the us feared that they would not be able to send satellites to space.

their earlier attempts of building and sending a spacecraft failed miserably, and the soviets successfully did it. it gave rise to the era of cold war.