why entropy can not be negative ?

Question

 why the entropy of a universe can not be negative?

 

Answer 1

The natural trend of any thermodynamic system is to move toward a state of equilibrium.  Entropy increases as the system tends toward equilibrium.  While it is possible to decrease the entropy of a system by extracting heat from it, the entropy of its surroundings increases as heat flows from the system into the surroundings, so the net change in entropy of the universe is always greater than or equal to zero.  This is a consequence of the 2nd law of thermodynamics.  

Answer 2

entropy cannot go from disorder to order or randomness to planned