A fast-spreading invasive mosquito is raising alarm across Africa, as scientists warn it could fuel a resurgence of malaria in major cities. The mosquito, known as Anopheles stephensi, is unlike traditional malaria carriers. Even more concerning, the species has developed resistance to nearly every major insecticide currently used to fight mosquitoes, undermining one of the world's most effective malaria control strategies. Scientists are now racing to find new ways to stop the mosquito, from biological controls to innovative technologies and next-generation insecticides. As this resilient species expands its reach, researchers warn that staying ahead of the threat will require urgent action and global cooperation.