Description : What are some natural global or cosmic catastrophes which could actually happen -- probably with enough forewarning to cause a season of panic / terror / dread before they occur?
Last Answer : Solar flares destroying power grids yes and pelting the Earth with city-sized fireballs? no Massive meteor showers? theoretically possible, has happened but none scheduled any time soon ... warfare including nuclear, biological, chemical, space-based kinetic weapons, automated weapon systems, etc