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  "path": "/articles/d41586-026-01793-1",
  "publishedAt": "2026-06-04T02:16:00.259Z",
  "site": "https://www.nature.com",
  "tags": [
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  "textContent": "Nature, Published online: 03 June 2026; doi:10.1038/d41586-026-01793-1\n\nPassive heart-rate monitoring during regular phone use could provide early warning of health issues — plus, testing Richard Feynman’s solution to the ‘restaurant dilemma’ problem.",
  "title": "Your phone can use tiny skin-colour changes to measure your heart rate",
  "updatedAt": "2026-06-03T00:00:00.000Z"
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