These Cyborg Cockroaches Could Save Your Life

Researchers from the University of Queensland and the University of New South Wales have designed "Paraborg," a cyborg cockroach capable of aiding in disaster zones. These genetically modified insects can not only search for victims but also administer first aid. The project, published in Advanced Science, focuses on the Paraborg's two main functions: a camera-equipped version to assess the condition of victims and a version with an injection mechanism to deliver medication.

The team utilized giant burrowing cockroaches from northern Queensland, which grow up to 87 millimeters in length and weigh up to 40 grams. To attach the necessary electronics, the cockroaches were first anesthetized, allowing the researchers to install electrodes and microchips without harming the insects. Once the equipment was in place, the cockroaches resumed their usual activities.

Control over the Paraborg's movements was achieved using electrical stimuli applied to the antennae and cerci, which are protruding sensory organs at the rear of the abdomen. By stimulating each antenna independently, researchers could steer the roach's direction, while stimulating both cerci regulated its walking speed. Different frequencies between 10 and 40 hertz were found effective, while anything over 50 hertz became less responsive over time.

The injection mechanism, a small device that operates via a spring system, consisted of chambers filled with citric acid and baking soda. A chemical reaction, similar to a child's baking soda and vinegar volcano experiment, produced carbon dioxide to push the syringe's plunger and deliver medication. In tests, the researchers demonstrated successful injections within 150 millimeters of a simulated target, achieving a 95 percent success rate.

The overall success rate for the entire task, from departure to completing the injection, was 72 percent.

The researchers also showcased teamwork, with one cockroach locating a simulated target using a camera while another injected medication. Despite the promising results, the study didn't account for the complexities of real-world disaster conditions such as debris, uneven terrain, and shifting landscapes. The lead researcher, Tan Vo Doan, expressed hope that with additional resources, rescue teams of cyborg insects could be deployed in disaster zones within five to 10 years.

He suggested that instead of building single-purpose robots, the unique strengths of various insects could be harnessed for different rescue missions.