What made the printing press, one of the most innovative inventions in European history, so significant? A. People had to hand write books before the printing press.
B. The press used movable metal letters and wooden frames making printing more efficient to use.
C. People could move the printing press to different locations.

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.