Phys.org reports that researchers have built a soft robot arm powered by algae that uses light to grasp and lift small objects. The work was published on Thursday, 22 October 2026, according to the outlet.
The arm is described as soft, meaning it is built from compliant materials rather than rigid joints and links. Its power source is algae, and light serves as the trigger that drives the gripping and lifting motion. Phys.org's summary does not specify the materials used, the size of the objects handled, or the research team behind the device.
The report places the work in the broader field of soft robotics, where engineers look to flexible structures and living organisms for designs that differ from conventional metal-and-motor machines. Using algae as a power source and light as a control signal points to a system that draws its energy and its instructions from its surroundings rather than from an onboard battery and wired controls.
The headline and summary from Phys.org leave several basic questions unanswered, including how much weight the arm can hold, how quickly it responds to light, and whether the algae must be kept alive for the device to function. Those details are not available in the material reviewed here.
Watch for the full study or follow-up coverage from Phys.org for specifics on the arm's design and performance.
