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Three college students used first principles to design a purely mechanical hearing aid costing only $19.99. Customized via AI and 3D printing, it requires no battery or circuitry, and has the potential to make hearing assistance affordable for hundreds of millions worldwide.
MIT.nano announced that 16 new startups have joined its START.nano accelerator program in 2025, focusing on hard-tech innovations in health, climate, energy, and quantum computing.