How can Genghis Khan, root canals, and cockroaches be more agreeable than our own government?

Which of these were effects of mass production techniques used during 1920s

Who intended to write an epic poem 12 books long

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.