Heisenberg : uncertainty principle

• Heisenberg is out for a drive when he's stopped by a traffic cop.
  The cop says, "Do you know how fast you were going?"
  Heisenberg says, "No, but I know where I am."
  

• You've perhaps seen or heard of old inns that have plaques on the wall of a room saying, for example: "George Washington slept here."
  Well, There's apparently an inn in Germany with their own plaque.
  It says: "Heisenberg may have slept here."
  

Werner Karl Heisenberg was born on 5th December, 1901, at Würzburg. One of the founders of quantum mechanics, and become famous with his uncertainty principle :

"The more precisely the POSITION is determined,
the less precisely the MOMENTUM is known"

Einstein's theory of relativity

Einstein's theory of relativity :

Two hairs in my cup of coffee is too much.
Two hairs on my head is too less.