"In mice" is a joke about how misleading it is to omit "in mice" from a study result based on mice. It doesn't make sense to apply it to a headline that does sa

"In mice" is a joke about how misleading it is to omit "in mice" from a study result based on mice. It doesn't make sense to apply it to a headline that does say "in mice", because then it seems to insinuate that mouse research is useless, when in fact countless foundational discoveries have started in mice.