Why were Americans scared that communists would try to take over the country? What did communism threaten?

Was the first african american to be appointed to the u.s. supreme court.

What conclusion about the role of the media can be drawn from these headlines?

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.