The voyages of european exploration during the 15th and 16th centuries were made possible mainly by
a) the protestant reformation.
b) the success of the crusades.
c) many new or improved technologies.
d) a desire to prove the earth was round.

Need it now explain gorbachev’s policy of glasnost. how did this policy change the soviet union?

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.

Between 1820 and 1860, the united states received a huge number of immigrants from european nations. on the map, identify the state where the most immigrants moved in search of jobs.