From using plant rinds to high-tech materials, bike helmets have improved significantly over the past 2 centuries
Helmet makers continue to innovate. Today, many commercial brands use a hard polyethylene terephthalate, or PET, shell around ...
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Bike Helmets Evolve: From Plant Rinds to High-Tech
Imagine - it's the mid-1800s, and you're riding your high-wheeled, penny-farthing bicycle down a dusty road. Sure, it may ...