Gigantic Ghostly Ring of Dark Matter Discovered by Hubble

Hubble Space Telescope has just discovered a gigantic, ghostly ring of dark matter at a distance of 5 billion light-years from Earth. So far, it's the most compelling evidence of the existence of the elusive dark matter.

Scientists have theorized on the existence of dark matter for some time, and they think it's a cosmic phenomenon that does not emit or reflect enough electromagnetic radiation to be observed directly, but who...

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