a.. I want to calrify the post I made about scientist. Obviously there is a
huge amount of scientific facts in textbooks and scientific journals but
there is also a tremendous amount of scientific discovery based on theory.
I mean to write that most scientific discovery is based on theory. Here is
a definition of science from dictionary.com
1.. The observation, identification, description, experimental
investigation, and theoretical explanation of phenomena.
2.. Such activities restricted to a class of natural phenomena.
3.. Such activities applied to an object of inquiry or study.

Even simpler: science = attempting to answer questions.

If there's a question, then theories usually arise from a set of
observations. Further data is generally needed to provide a logical basis
for that theory. And, quite simply, the theory with the most compelling
evidence wins. Sometimes the evidence is overwhelming. Other times it's
not, either due to technical constraints or a theory that is wrong or
fails to capture the phenomenon in its entirety.