Not all science is positive, it has been used for mass destruction and death. Billions of dollars go into the studies where science is the main recipient. Years may pass before success can be realized or even occur in the studies this money goes for. Cancer, M.S. and AIDS are just three studies that science concerns themselves with. The amount of money poured into these studies have been tremendous but the outcome has not.
Cloning is a subject that has been presented in the past few years and has achieved great successes.
Ethical concerns must not be an area in life that science concerns itself . There have been many great discoveries in science that have allowed the present generation to live healthy and productive lives. My response would have to be that science is the discovering of the world around us and how it works or is put together. There are so many different facets to it and so many different ways to incorporate the teaching of science into the students everyday life. Science is the knowledge we gain about things we don't understand.