 environment, and you can expose these mice early in life to these chemicals and see what happens. Do they develop cancer? Do they develop cancer at a younger age? So we're experimenting with all these things. But again, I think the ideal study is to start studying people from in utero, through infancy, through childhood, through adolescence, collect all this information on their lifestyle, collect specimens, and then follow them through time. But that study is very hard to do, costly, and probably takes too long. So we need other ways. Yeah.