Learning from Nature: The Biomimicry Podcast with Lily Urmann

Biomimicry and Circular Systems: Designing for Resilience with Rana Hajirasouli

Dec 9, 2025
Rana Hajirasouli, founder of The Surpluss and a recognized circular economy innovator, dives into the world of resource sharing inspired by nature. She shares her journey from surplus medical equipment to establishing systematic solutions that enhance resilience in industries. Topics include using slime mold for efficient network mapping and the challenges of adopting circular models in varying cultural contexts. Rana emphasizes the importance of collaboration and local adaptation, all while weaving in her unique PhD research insights.
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ANECDOTE

Personal Loss Sparked A Circular Startup

  • Rana discovered surplus potential after her father's emergency revealed nearby unused defibrillators.
  • That experience inspired her to found The Surpluss to map and trade excess industrial resources.
INSIGHT

Surplus Is A Trillion-Dollar Hidden Economy

  • About $1.8 trillion of excess inventory sits unused annually across supply chains.
  • Treating surplus as a hidden economy reveals massive untapped value and resilience opportunities.
INSIGHT

Slime Mold Inspired Network Design

  • Rana modeled The Surpluss matchmaking on slime mold networks and fungal reciprocity.
  • She used distributed memory and decentralized pathway reinforcement to map resilient resource flows.
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