Dark Matter

One of the big mysteries that still remain unsolved, is dark matter and dark energy. We know that they exist though. So what do we know about those strange things?   Watch the video…

Above: Dark matter is invisible. Based on the effect of gravitational lensing, a ring of dark matter has been inferred in this image of a galaxy cluster (CL0024+17) and has been represented in blue.  Credit wikimedia

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