Why does everything have a life span?

Question

Everything from mechanical objects, a fruit fly to the Sun - all have a life span. Why? Is it the inherent imperfections in each object, 2nd law of thermodynamics, chaos theory, what?

Answer 1

Due to the dimension of time.

Answer 2

well the object of everything is and end.

Answer 3

Mechanical objects have an expected lifespan which is engineered.  Building an object to last longer in its expected environment can usually be done with more exotic processes and materials, but that increases cost.  Imperfections aren't necessary for wear.  Keep rubbing a steel ball bearing, and you gradually remove steel.

Biological lifespan is actually part of the design.  Scientists are learning a lot about the mechanisms in DNA which cause aging and death of the organism.  In simple experiments, they can prevent those processes using DNA modification.  Thermodynamics isn't particularly relevant.  Chaos theory helps study variations in an aging timetable, and can study accidents.

Answer 4

It is so ordained that everything has a beginning and an end.  God said;  I am the Alpha and Omega.  Nothing would ever be accomplished if there were no time limits.  We would be so lazy.  In Science we realize the oxy-moron that "the only constant in the Universe is change."  Nothing ever stays the same.  Work with it.