In today's image, we see a simulation of the universe showing the dark matter which is far more prevalent than the ordinary matter that we are used to. Studies have confirmed that it is not possible for this dark matter to be ordinary matter, but perhaps an exotic type of subatomic particle.

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This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.

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