If found out that the whole world where aliens I would leave to my island and then hide there for the rest of my life nobody would see me and I would see nobody just me and my dog and my pistol and my knife. I would fish every day for me and my dog and kill chimpanzees monkeys and eat them. I would make a hut for me and my dog to be safe when hurricanes come through. I would try to survive as long as I could until I find other survivors. I would survive for years with this island because I would breed animals from the island and plant more trees to stay alive. Live here for the rest of my life in solitude with just my dog and me. I would wait as long as it takes until the aliens leave the planet. Then when they leave I would go around the whole world looking for survivors. We will create a colony and live the rest of our lives and happiness now that the aliens are gone .