What will happen after billion years??

What will happen after billion years??

 we know we evolved from our  ancestors

 Those who were simpler than us means they were less developed than us and as time progressed they evolved and turned into today's humans but do you know where those ancestors would have come from.

  We tell tricks, not only our ancestors, all the animals in the world have appeared from their ancestors only. And those ancestors appeared from a cell which is called a protocell. Today we have become short in knowing how this earth would have been formed and how the first light of life would have lit on it. 

 Explorers Oparin and Haldane told that life on our earth must have originated from a prebiotic soup (warm ocean) and this discovery was later introduced by the explorer urey-miller, he explained how to make large molecules from simple molecules. After that famous scientist, darwin told that as we move forward we have become so complex that in the coming time, we will reach the same place from where life started i.e. protocell, and we will gradually get smaller and mix back in the water and this earth is like this. For example, some 100 years ago people used to be 10-20 feet tall and today's people remained half of their length and will become even smaller in the coming times.