Herbicides have been used for decades to control weeds in crop fields. However, a such strategy fails in the long run because weeds, as any living organism, adapt and modify their metabolism to tolerate the toxic chemical. Scientists Fernandez et al. have evidenced the first case in France of glyphosate-resistant weed in the species Lolium rigidum. They also found that this smart weed has not developped only one, but three different defense mecanisms in weed genes.