Regenerative Biohybrid Actuation: Yeast SiliconeLiving Materials for Fermentation Powered Untethered Soft Robots

For millennia, yeast has turned sugar into carbon dioxide to feed cultures and sustain life. Here, we ask what happens when that quiet metabolism is invited to do mechanical work. We explore fermentation as a low-pressure, renewable source of motion inside soft matter, where actuation unfolds as a legible temporal narrative: priming, lag, rise, and release. We introduce a fermentation--actuation model linking microbial dynamics to deformation and use it to guide retention-focused material design. The result is a glimpse of soft robots powered by living chemistry.