Tiny, pesky and deadly, Aedes aegypti mosquitoes are super at spreading disease, including dengue, chikungunya and Zika virus. Yet all over the world, scientists, nonprofits and biotech companies are raising hordes of this species to release into the wild.
Why is that?
For decades people have relied on industrial pesticides to beat back mosquito populations and limit the diseases they spread. But with continued use, some pesticides lose their effectiveness as the bugs build up resistance.