The universe !!! This is one of the many unanswered questions that humans have had for a long time, from the time when Homo sapiens came out of the caves to search for fire and plan to build settlements on Mars.What is the universe? how it origins ? the biggest question among all of those are are we alone ? .well people have so many theories but the truth is we don't know exactly it!!! can we be alone this big universe?just forget about the universe and think about milky way which we are living it's even big that we cannot imagine.researchers are saying that it has more than 10 billion starts.if its how can we imagine the scale of the universe?even from those numbers there are lot of planets which located in the habitable zones which are suitable for the living things.so we can think there is lot of chance out there to have a lives beyond us in the universe.and the other thing is there is no rule that all lives should be origin based on carbon element.why cannot we think abo...