sciguy52 t1_iwxi8bk wrote
Reply to comment by JohnMayerismydad in Dark Matter as an Intergalactic Heat Source. Spectra from quasars suggest that intergalactic gas may have been heated by a form of dark matter called dark photons. by MistWeaver80
Flip side of the same coin. Energy can be made into matter, and matter can be made into energy based on E=mc2
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