It was around 14 billion years ago when the Big Bang took place. Ever since then, the universe is expanding. Some scientists opined that the rate of expansion is increasing day by day. But, the laws of thermodynamics are giving scientists a new perspective of the future universe. The first law of thermodynamics states that the energy can neither be created nor be destroyed; it can only transform from one source to another.
The second law of thermodynamics is the real reason why the scientist communities fear that the universe will end as a cold, lonely, and an inevitable place. The second law of thermodynamics reveals that if two bodies, having different temperatures, come in contact with each other, the heat will transfer from the hotter body to the colder one. However, the efficiency of the process will never reach 100%. This property is also known as entropy.
The Possible End Story of Our Universe
The second law means the energy across the universe will scatter when they transform from one form to another, as the process is not 100% efficient. When it happens, the existence of no life form will possible, and the universe will only be left with black holes and stars.
After around 100 trillion years, when all the stars will go out, the universe will turn into a black place, but this will not be the end of the world. The black holes will start to consume all the matters present in the universe. They will only stop when nothing else is there to eat. Once nothing will be available to drink, the black holes will emit radiation. The process is commonly known as Hawking radiation. They will release everything that once that swallowed. When the last black hole dies, the universe will be left with nothing, except photons. Then for the first time, the world will be unchanging, and nothing will happen forever.