by artificial means
Adverb
Meaning
not according to nature; not by natural means
Source: WordNetSynonyms
Examples
The aim of every artist is to arrest motion, which is life, by artificial means and hold it fixed so that a hundred years later, when a stranger looks at it, it moves again since it is life.
But when one believes in the reality of things, making them visible by artificial means is not quite the same as feeling that they are close at hand.
artificially induced conditions