Supervoids vs Colliding Universes! | Space Time

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Could the mysterious Cold Spot found in the CMB be the result of a collision with a bubble universe? Try 23andMe at

[CORRECTION: The calculated ISW cooling from cold spot observed voids is 0.000032 Kelvin not 0.032 K as is listed on screen, the actual cold spot temperature differential is 0.000150 Kelvin not 0.15 K, and the actual ISW cooling from the control region is 0.000014 Kelvin not 0.014 K. The actual control region temperature differential is 0.000015 Kelvin not 0.015K. Thanks to Chris Morong for catching this discrepancy!]

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The Fate of the First Stars

Space Time Journal Club examines Evidence Against a Supervoid Causing the CMB Cold Spot

If you study a map of the Cosmic Microwave Background, or CMB, you may notice a large, deep blue splotch on the lower right. This area, creatively named the Cold Spot. Is this feature a statistical fluke, the signature of vast supervoids, or even the imprint of another universe?

Written by Matt O’Dowd and Alexandra Yep
Hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Kurt Ross
Made by Kornhaber Brown (

Local Voids as the Origin of Large Scale CMB Anomalies

Watching Worlds Collide

Comments answer by Matt:




Andrew Wright

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