A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs episode artwork

EPISODE · Mar 18, 2026 · 40 MIN

A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs

from Walkabout the Galaxy · host Josh Colwell, Addie Dove, Audrey Martin, Jim Cooney

Gravitational Wave observatory LIGO has seen a signature that looks like the merger of primordial (pre-stellar, big bang (not big band!) era) black holes. If confirmed with future observations, this would tell us a lot about the early universe and potentially shed light on dark matter. Finally! Plus, closer to home, the BLOBs in the Earth's mantle help us untangle the complicated past of our magnetic field.

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A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs

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This episode was published on March 18, 2026.

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Gravitational Wave observatory LIGO has seen a signature that looks like the merger of primordial (pre-stellar, big bang (not big band!) era) black holes. If confirmed with future observations, this would tell us a lot about the early universe and...

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