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  "path": "/story/387464/mystery-die-off-threatens-freshwater-mussels.html",
  "publishedAt": "2026-04-17T08:00:00.000Z",
  "site": "https://www.newser.com",
  "textContent": "Freshwater mussels have been dying out in North America, and the people who study them still don't know why. The continent once hosted 300 freshwater mussel species—many living for decades, some more than a century—anchored in riverbeds and helping to filter vast amounts of water, per Scientific American...",
  "title": "No One's Sure What's Causing This 'Environmental Catastrophe'"
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