Which of these product innovations was NOT inspired by biomimicry (designs copied from nature)?

Nature has been perfecting designs for billions of years, and innovative companies are increasingly looking to the natural world for sustainable product solutions. Biomimicry—the practice of emulating nature's time-tested patterns and strategies—has inspired groundbreaking product innovations across industries. Test your knowledge about how the natural world has influenced some remarkable product designs!

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Velcro, which was inspired by how burrs from burdock plants stick to animal fur and clothing
Shinkansen bullet train's noise-reducing front design, modeled after a kingfisher's beak
Memory foam, which was originally developed as a purely synthetic solution for NASA spacecraft cushioning
Speedo's Fastskin swimsuits, which mimic the texture of shark skin to reduce drag in water