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Although that description sounds like the start of a sci-fi or horror movie, the team led by Hirotaka Sato at Nanyang Technological University has been working with the much-hated pest for a good while, outfitting them with infrared cameras in a bid to help rescue operations by steering the roaches in disaster areas to find survivors. To be clear, as the release notes, Cyborg insects are living insects that have been retrofitted with technology. Sato's team had already demonstrated an orchestrated swarm of the little beasties in 2024, but reportedly wasn't happy with the fact that they couldn't send them through water, and went back to the drawing board to fix that.
The result is an upgraded form that went underwater for three hours in stages, at a depth of 20" (50 cm); enough for most puddles and lightly flooded areas. Quite interestingly, the roaches' speed was only lightly affected, going from 3.5" (8.75 cm) per second on land to 3.1" (7.84 cm) a second while submerged in water. Cockroaches don't swim per se , but they can paddle-float, and are fine navigating water bodies in general, and it's possible they can go deeper than in the test.
To achieve this, the animals wear a spiffy-looking bespoke 3D-printed scuba suit, complete with tubes that attach from the tank to their "nostrils," called spiracles. The tank has a sponge with both hydrogen peroxide and manganese dioxide, in a slow, carefully tuned reaction that outputs oxygen at a controlled rate. This choice was made to avoid the tricky task of providing a heavy, pressurized oxygen tank — though imagining a cockroach with a tiny tank backflipping into water from a tiny boat is amusing.
The cockroach is pretty much the ideal platform for this type of endeavor, as their legs are easy to control with electrical impulses, and their locomotion characteristics let them navigate almost every type of terrain, oftentimes better than many miniature robots. Their biological batteries theoretically last for weeks on end, too. One roach needs food only every few weeks, a mission-critical feature given that scientists working with miniaturization of any sort keep butting their heads against energy limitations. The IR cameras and wireless do use an actual mini battery pack, but the insects themselves can find sustenance on their own.
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Reference reading
- https://www.tomshardware.com/tech-industry/robotics/SPONSORED_LINK_URL
- https://www.tomshardware.com/tech-industry/robotics/scientists-have-created-a-3d-printed-remote-controlled-cyborg-cockroach-equipped-with-ir-cameras-living-insects-fitted-with-flexible-diving-suit-can-survive-and-move-underwater-for-three-hours#main
- https://www.tomshardware.com/subscription
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