Things are changing with time.  What we have today will not be tomorrow, but even better one will be there in our hand.  Various scientist and researches are changing the face of this world.  All these changes are for the betterment of the human life and the planet earth.  This may be the advancement of the new era, or even the development of the new world.  But, all such changes are for the betterment only.  Thousands of dollars are spent on the research and then we get the final product.  ...