Pangea

picture from here 

    

If Pangea suddenly formed together again we would have a major earthquake and thousands or even maybe millions of people would die. The reason we would have a major earthquakes is because when two tectonic plates crash together it causes an earthquake and since there crashing into each other really fast and hard it causes a real big earthquake. The reason people would die is because when you have an earthquake is causes a fault and when a fault happens it creates a big hole or crack in the earth and people could fall in and die. So this is what would happen if Pangea ever formed again.