Back to science fiction, a disturbing thought entered my head. Assuming that a person is immortal. In other words, the person can never die. No bombs can harm. No disease can wreck. Nothing can make a dent in the person's ability to keep on moving. Suddenly a thermal nuclear holocaust errupts. Everybody born mortal dies instantly. No more food. No more water. No vegitation. Everything is gone. Yet, the immortal person keeps on moving. Then the Earth's sun goes supernova and swallows up the sun. That means that the immortal person is still alive and free floating in outer space. Yes, that's a scary thought. Let's hope it never happens. We don't want more people getting scary thoughts involving nuclear weapons.