Which of these famous product designs was NOT inspired by a direct observation from the natural world?

Biomimicry is the practice of looking to nature for inspiration to solve human challenges. Many groundbreaking product designs have emerged from studying plants, animals, and natural systems. This poll tests your knowledge of how the natural world has influenced innovative product designs that have transformed industries and solved complex problems while creating more sustainable solutions.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Velcro (inspired by burdock seed burrs that stuck to a Swiss engineer's dog)
Shinkansen bullet train nose (inspired by the kingfisher bird's beak for reduced sonic booms)
The Post-it Note (inspired by the adhesive properties of gecko feet)
Swimsuits with shark-skin-inspired textures to reduce drag for competitive swimmers