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High-flying, solar-powered drones could serve as floating cell towers, connecting remote users and providing continuous service across the globe—a “phenomenally complex technical challenge,” says Michel.

The study, led by biologist Gabriel Perron in collaboration with microbiologist M. Elias Dueker, both on the faculty of the Bard Center for the Study of Land, Air, and Water, shows that even small concentrations of the synthetic antimicrobial agent triclosan can disrupt freshwater microbial communities in favor of bacteria that are associated with human disease and antibiotic resistance.

The new missile, which carries no explosives, is designed to kill a single person without hurting those around them, thus reducing unnecessary harm. The reality is likely a little more complicated than that, writes Michel.