Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world.

Louis Pasteur

Science is built up of facts, as a house is built of stones; but an accumulation of facts is no more a science than a heap of stones is a house.  ~Henri Poincaré,Science and Hypothesis, 1905

The whole of science is nothing more than a refinement of everyday thinking.

  ~Albert Einstein