Scientists use an established framework to experimentally test the implications of the latest paradigm--until it doesn't work any more.
Then, someone comes up with a new paradigm--and, off to the laboratory--the process starts all over again.
“Doing science” is or becomes an evolutionary activity in itself. This ties in with my notion that the purpose of evolution is to evolve, it is what we do (or should) do.
It will be interesting to see where the next evolutionary paradigm shift will be!