Science cannot be only a Petri Dish experiment. In science, sound evidence should be shown also in vivo, ie real life.
For example, do not believe GE Séralini: it appears he makes the confusion between in vitro toxicity and in vivo toxicity in some of his articles. Look here on ForumPhyto (in French: sorry!).
Xkcd is a Web comics Internet site dedicated to science. Explore it: you will have some fun.
