Arno Penzias — American Scientist born on April 26, 1933,

Arno Allan Penzias is an American physicist, radio astronomer and Nobel laureate in physics who is co-discoverer of the cosmic microwave background radiation, which helped establish the Big Bang theory of cosmology... (wikipedia)

I feel that I learned far more from my students than I could possibly have taught them.
Change is rarely comfortable.
If you don't want to be replaced by a machine, don't try to act like one!