Until recently, the screwworm population was kept at bay via a biological barrier along the Darién Gap at the border of Panama and Colombia. The USDA partnered with authorities in Panama to build a sterile fly production facility at the gap to regularly release sterile flies and hold the line. But in 2022, the barrier was breached, and the flies have been relentlessly buzzing northward since.
I usually rather like Ars, but there’s something very weird and silly about applying the idea of borders, especially non natural ones, to flies.
“Your puny human constructs are nothing to me, flesh bags.”
But the fly had been warned once before !
it makes more sense with context