Smiling robot face is made from living human skin cells ( www.newscientist.com )
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Original publication: https://www.cell.com/cell-reports-physical-science/fulltext/S2666-3864(24)00335-7
Without paywall: https://archive.ph/XIAZy
Without paywall: https://archive.ph/0KvTq
Without paywall: https://archive.ph/e7Fgt