In these times of pandemic lockdowns, many of us dream of walking on a beach at sundown, feeling the sand under our toes and hearing the soothing pulse of the surf. Even if you're lucky enough to have a virtual-reality (VR) headset, such a simulated experience doesn't come close to the reality. But advances in materials and devices that can interface intimately with the body hold the promise that VR, and the related technology of augmented reality (AR, where our regular experience of the world is enhanced or modified), could be ever more realistic.
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