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

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.

You can listen to A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs online on Radio and Podcast. Open the player on this page to stream the available audio.

A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs is an episode from Walkabout the Galaxy by Joshua Colwell.

This episode is 40:48 long.

This episode was published on Mar 18, 2026.

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