Danish engineers created a soft robot worm, and the internet saw something else entirely

Researchers at SDU Soft Robotics, part of the University of Southern Denmark, have built a soft, limbless robot that can crawl across rough terrain much like an earthworm.

The project was meant to serve as a tool for search-and-rescue missions, but it became known online for an entirely different reason. After footage of the robot started circulating, viewers immediately zeroed in on its rather unusual shape.

The official name is far less catchy than the jokes flooding the comments: "Multimodal Limbless Crawling Soft Robot with a Kirigami Skin." Movement comes from two inflatable soft actuators that act as artificial muscles. The robot alternates between inflating and deflating internal chambers, letting it stretch, contract, and push itself forward without any wheels or limbs.

The key part of the design is a flexible kirigami skin, a technique built around cuts and folds that spread friction unevenly across the body. One section grips the surface while another slides ahead, recreating the peristaltic crawling motion of a worm.

Beyond moving in a straight line, the machine can turn and rotate in place. Built-in proximity sensors help it detect and avoid obstacles. The team behind it hopes machines like this one could eventually work in tight, unpredictable spaces where people or wheeled equipment simply can't go.

The researchers point to several possible uses:

• locating survivors trapped under collapsed buildings

• environmental monitoring in hard-to-reach areas

• inspecting industrial pipelines and narrow utility spaces

Soft robotics as a field keeps growing as an alternative to rigid metal machines. These robots can bend, squeeze through gaps, and avoid damaging whatever they touch, which matters a lot when working around debris. Nature still provides most of the inspiration here, with worms, caterpillars, and octopuses serving as go-to models for engineers.

Still, most people online skipped past the engineering and went straight for the jokes. The clip spread across Reddit, where commenters focused entirely on the robot appearance and its pulsing movements.

One commenter wrote:

Yeah... A worm...

Another added:

Why do I feel like someone is gonna use it for something else?

Compared to other robotics milestones in recent years, this project looks modest in scale but takes a completely different approach. Humanoid robots have already run half-marathons, pulled off backflips and kung fu combos, and some have even outpaced Usain Bolt records. Soft crawling machines aim at the opposite goal – they're not trying to outperform humans in speed or agility, they're built to reach places no walking robot ever could.

For now, this remains an early research prototype rather than a finished system ready for real rescue operations. The team still has work ahead on control, autonomy, and overall reliability before any field testing happens.