Biohybrid Robots Harness Nature’s Design to Revolutionize Reforestation – One Green Planet

In a groundbreaking development, researchers are leveraging the unique mechanics of wild oats to create biohybrid robots, aimed at boosting reforestation and precision agriculture efforts. These innovative robots, inspired by the fruit of the Avena genus, navigate and implant themselves into soil autonomously, potentially revolutionizing ecological restoration and agricultural practices on Earth and beyond.

Source: Bloomberg Originals/YouTube

The design of these robots stems from the wild oats’ natural fruit, which employs a remarkable strategy to disperse seeds. The fruit features two bristle-like structures, known as awns, which twist in response to humidity changes. This twisting action stores elastic energy, which is abruptly released to thrust the seed into the ground, ensuring effective germination. By mimicking this mechanism, the robots can move independently and settle into the soil, thereby planting seeds or delivering nutrients effectively.

Isabella Fiorello, a leading bio-roboticist involved in the project, opted to utilize the natural awns directly rather than creating synthetic actuators. This decision harnesses the inherent efficiency of the biological system, which performs optimally in varying humidity conditions. Fiorello and her team, collaborating with the Italian Institute of Technology and the University of Freiburg, have engineered sustainable capsules composed of flour and cellulose. These capsules are both safe for the environment and fully biodegradable.

The assembly process involves pressing these natural ingredients into capsules using a reusable mold, after which the awns are attached. Once deployed in the field, either manually or via drones, these biohybrids, aptly named Hybribots, exhibit behaviors akin to their botanical inspirations. They leap and burrow into the soil, finding niches where they can release their cargo — be it seeds or nutrients.

Preliminary tests have shown that the torque and soil penetration force of the Hybribots is comparable to that of natural wild oats across various soil types, including dirt, loam, and clay. This promising result underscores their potential to effectively reforest areas with poor soil quality, without posing any harm to local biodiversity or wildlife.

Looking ahead, the applications of these biohybrid robots are vast. Fiorello envisions their use in less fertile terrains such as lunar or Martian soil, potentially pre-loaded with essential nutrients to Support seed growth in harsh, extraterrestrial environments. This innovative approach not only offers a sustainable solution to ecological challenges but also paves the way for advanced biotechnologies in space exploration and habitat restoration.

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