21 cm signal from the cosmic dawn

GALAXY-and-GAS_highres-1_1024

a detection of surprisingly strong absorption by primordial hydrogen gas, reported earlier this year, could be evidence of dark matter.

http://www.dailygalaxy.com/my_weblog/2018/07/todays-top-science-news-mystery-signal-from-the-dawn-of-the-universe-may-unveil-a-new-physics.html

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