Laser inventor and Nobel laureate Charles Townes dies at 99
newscenter.berkeley.edu
newscenter.berkeley.edu
The Berkeley memoriam talks about his work with masers and lasers, but also mentions his contributions to the beginnings of infrared astronomy, and the evidence for a black hole being in the center of our galaxy. He really had wide-ranging interests and talents.
To someone downvoting - don't you find it interesting that someone so brilliant can have such difficulty with simple concepts even a child can grasp?