Walkabout the Galaxy

Author: Joshua Colwell, Adrienne Dove, and James Cooney

An irreverent and informative tour of the latest, greatest, and most interesting discoveries in astronomy.
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Language: en

Genres: Comedy, Natural Sciences, Science

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A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs
Episode 422
Wednesday, 18 March, 2026

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.