Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas cover image

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

310 | Marc Kamionkowski on Dark Energy and Cosmic Anomalies

Mar 31, 2025
Marc Kamionkowski, a leading cosmologist at Johns Hopkins University, dives into the intriguing realm of dark energy and cosmic anomalies. He discusses the shocking 1998 discovery that the universe is accelerating, exploring the implications of the cosmological constant and its puzzlingly small value. Kamionkowski shares insights on the Hubble tension—discrepancies in the universe's expansion rates—and the potential for dark energy to vary over time. Their conversation showcases the ongoing battle to decode the universe's mysteries through collaborative scientific efforts.
01:26:14

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Quick takeaways

  • Recent findings suggest that dark energy's density may be changing over time, challenging its previous classification as constant.
  • The Hubble tension highlights a discrepancy in the universe's expansion rate that raises significant questions within the cosmology community.

Deep dives

The Importance of Collaboration in Hiring

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