Climate change has brought dramatic droughts and floods around the world, ruining harvests of important cereal crops and reviving concerns about food security on a warmer planet. Researchers at the U.S. Department of Agriculture are looking at cereal crops at risk and their wild, weedy relatives. As producer Zulima Palacio tells us, the weeds are more resilient under extreme conditions, and seem to be benefiting from climate change, while regular crops suffer.