Need ! how did sumner define liberty in the book of "voices of freedom"

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.

Supreme court cases can alter history? true or false

“from stettin i the baltic to trieste in the adriatic, an iron curtain has descended across the continent? ” the term iron curtain refers to which of the following? a. a military operation b. communism c. hard-line politics d. machine-driven battles e. unyielding diplomacy