A surprising chill before the cosmic dawn

A surprising chill before the cosmic dawn

A surprising chill before the cosmic dawn, Published online: 28 February 2018; doi:10.1038/d41586-018-02310-9

An experiment to estimate when stars began to form in the Universe suggests that gas temperatures just before stars appeared had fallen well below predicted limits, and that dark matter is not as shadowy as was thought.
Source: Nature