What was a major cause of the famines in ukraine
between 1929 and 1935?
(1) war with chechnya and armenia
(2) forced collectivization by the government
(3) lack of arable land in the region
(4) movement of workers to siberia

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.