Most of the universe is missing

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Scientists all over the world are searching for dark matter: an invisible, untouchable substance that holds our universe together. But they haven't found it. Are they chasing a ghost? For further reading, sign up for our newsletter here: http://vox.com/unexplainable-newsletter Show transcript and articles (including one about why we made this show now): http://vox.com/unexplainable Email us! unexplainable@vox.com We read every email. Learn more about your ad choices. Visit podcastchoices.com/adchoices