7 most dangerous things in the universe that could destroy the earth

The outer space holds many fascinating mysteries, but also, many deadly dangers. It is a violent place in which phenomena more powerful than the explosion of atomic bombs. These phenomena can destroy entire populations. They are uncontrollable and almost inevitable occurrences. These forces are already active, hidden in the corners of the universe. Here begins a journey, for "The 7 most lethal threats that could truly end the earth” !