Scientists Released Three Million Mosquitoes in Towns — What Happened Next Was Surprising

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A 20-week Australian trial showed released male mosquitoes could cut local Aedes aegypti numbers dramatically.

The Mosquitoes Were Released in Northern Australia

Every Released Mosquito Was Male

They Were Not Genetically Modified

One Mating Could End a Female’s Reproduction

Releases Continued for 20 Weeks

Producing Three Million Required Far More

Populations Began Falling Within Four Weeks

One Town Recorded a 97% Reduction

The Other Towns Produced Different Outcomes

The Target Was a Major Disease Carrier

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Releasing millions of mosquitoes sounds like the opposite of pest control. Yet the experiment was designed around a biological weakness that could turn the insects against their own population.

The operation required unusual precision, extensive preparation and repeated releases across entire communities. Its results showed both the power of the method and the limits scientists must overcome before using it elsewhere.

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