Hadron era

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What Wikipedia says

In physical cosmology, the hadron era is a range of time in an obsolete model of the very early universe. It was said to have begun at a time of 10−44 seconds, or at 10−8 seconds, and ended at 10−4 seconds.

Excerpt from the Wikipedia article “Hadron era”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA / WMAP Science Team, Public domain, via Wikimedia Commons.