How does scientist discover new knowledge?

When one body in space blocks another body in space this is known as an? How do you say windmill in Dutch? How many ampere oc circuit breaker the 2 horse power aircon needed? What is the 2013-2014 snowfall total for anchorage? How much more heat does methane trap than carbon dioxide? What is difference between penstock and pressure shaft? Can you strain a nerve in your shoulder? What are two pieces of evidence used to support the theory that dinosaurs became extinct as a result of volcanic eruptions about 65 million years ago? What are three homogeneous mixtures you can find at home? How does calcium- phosphorus deficiency affect our body? What does Antarctica sound like? How do you change one breaker on a 3 wire that feeds two regular circuit breakers to a single arc fault circuit breaker - or do you have to change both breakers to arc fault so each has a neutral? How large is the area of lochaber? What physical property of some metals allows them to stretch and be used as wiring in homes? Do forest fires affect the ocean? What is recycling in the biosphere? Is candle wax soluble? How much total energy is lost from a three step food chain if 1000 calories enter at the autotroph level? How does tap density and bulk density differs? What is the name of the Northern arm of the Black Sea?