What do scientists do during an investigation?

Answer 1

If I recall the Scientific Method, scientists first develop a theory, then conduct tests to determine the validity of their theory, examine the test results, and often need to readjust elements of their theory, and start over conducting more tests and, if they have proof that their theory is true, then they need to have it duplicated by another independent scientific lab before they can publish their findings. (This is a very brief overview!)