Recently, i have been told about some kinda nuclear things, wars ... And there is some problems, mysteries that i need to know clearly. This is my very first post on Reddit, if there is any mistake or something, i will be very appreciated if you guys help me to improve it. Thanks.
It would be helpful if you formulated a more specific question, and further clarified what you mean in the body of your post, because "some kinda nuclear things" and "some problems, mysteries" are much too vague. What are these things you've been told about and what are the problems and mysteries you don't understand?
In the meantime, though, you might find helpful this previous answer by u/restricteddata, based on your apparent interest.