UT Game Changers: Karl Gebhardt, Black Holes and Dark Energy

In this excerpt from LHN Game Changers, University of Texas astrophysics professor Karl Gebhardt addresses some big issues in his work. Big, as in galactic.
Most of his career has focused on understanding the role that black holes play in the formation of a galaxy. Now he is helping lead a new scientific revolution: the quest to understand dark energy, a mysterious force that makes up 70 percent of the matter and energy in the universe.
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