“One obstacle that faces ground-based robots today is an inability to instantly adjust or adapt to unstable terrain,” Culver said. “Muscle actuation, though certainly not solely responsible for it, is a big contributor to animals’ ability to navigate uneven and unreliable terrain.” 

Biohybrid technology could allow robots to adjust their “envelope” or their overall body shape, making it easier for them to maneuver in tight spaces, or in real-time on a battlefield with evolving obstacles. 

“Similarly, flapping wings and flying organisms’ ability to reconfigure their envelope gives them the ability to dart here and there even among branches. In multi-domain operations, this kind of agility and versatility means otherwise inaccessible areas are now viable, and those options can be critical to the U.S. military’s success.”

Biohybrid technology has largely been an academic enterprise. A report on biohybrids from 2019 cites several university programs, including a Harvard team, that successfully created a biohybrid fish capable of swimming like a ray, and a Tokyo University group that designed small, finger-like biohybrids. But with ARL picking up the biohybrid ball, the technology is sure to get a boost. 

In general, robotics have become a large part of defense spending in recent years. In 2019 alone, a single Massachusetts-based robotics research company earned over $160 million in defense spending. Large defense contractors, like FLIR, are the go-to firms when the Army needs a new toy. 

NASA is also getting in on the biohybrid action. In a report from 2019, NASA researchers explained how biohybrids could be revolutionary when it comes to space exploration. The goal would be to use biohybrids “in situations that are ‘dangerous, dirty, or dull,'” and to “help keep astronauts safe and productive while conducting their lives in space and other planetary bodies.”

These biologically-enhanced robots could begin to replace animals still serving in the ranks. Military Working Dogs, for example, while extremely good at detecting drugs, explosives, or humans, are susceptible to the dangers of the battlefield. And, just like the noble war-horse, dogs and other highly trained animals — like those trained under the Navy’s Marine Mammal Program — will undoubtedly be phased out in favor of machines which can work longer, harder and don’t require food, water and specialized care. 

But Army robots are still highly limited and cannot perform the way a well-trained animal can. They are, essentially, remote-controlled devices that are unilateral in their application.

“Though impressive in their own right, today’s robots are deployed to serve a limited purpose then are retrieved some minutes later,” said Culver. “ARL wants robots to be versatile teammates capable of going anywhere Soldiers can and more, adapting to the needs of any given situation.”

Dr. Culver believes that by equipping robots with biological material, they could come to contend with and eventually outperform military animals.

“Organisms outperform engineered robots in so many ways,” he says. “Why not use biological components to achieve those remarkable capabilities?”

This article was originally published on January 2, 2021.