Explain manifest destiny. What was it? Where did the idea come from? What did it mean for the people in the east? What did it mean for the people and animals in the west? Why is it so important?

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.