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August 29, 2015

Researchers from the University of Oklahoma and China examined observations from the Hubble Space Telescope and discovered two massive black holes in the quasar Mercarian 231. Photo: Space Telescope Science Facility, Baltimore, Maryland.

For the first time, two huge black holes were discovered in the galaxy, and it is estimated that they will collide

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proteins inside the cell. Image: Courtesy Nicolle Rager and National Science Foundation

Scissors for removing proteins

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