Cold War nuclear tests nearly doubled the carbon-14 in the atmosphere, leaving an isotopic timestamp inside cells born during those decades — and researchers later used that accidental fallout to answer a question anatomy had failed to settle: whether the adult human heart can make new cells

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All 1 reports on Thu, 20 August 2026

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Jeremy Elser Karolinska Institutet Kenneth Margulies Marco Durante Kirsty Spalding Bruce Buchholz Olaf Bergmann Walter Kutschera Karolinska Institute University Of Pennsylvania Stockholm, Stockholm, Sweden

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Thu, 20 August 2026
1 report
- spacedaily.com10:45first to report
  Cold War nuclear tests nearly doubled the carbon-14 in the atmosphere, leaving an isotopic timestamp inside cells born during those decades — and researchers later used that accidental fallout to answer a question anatomy had failed to settle: whether the adult human heart can make new cells
  Researchers discovered an unexpected gift in radioactive fallout: a biological clock precise enough to settle whether adult hearts can regenerate.