Tombstone of Four-Dimensional Fragments

In order to cope with the coming unspeakable cosmic disaster, mankind launched the "Tombstone Project", selecting the best scientists to enter the fragment capsule to carry out lonely research for a period of "one year in external time and a thousand years in internal time". His wife was selected to perform the mission. When he welcomed his wife back a year later, he found that her hair was white and she was haggard. What's even more frightening is that she brought back the key theory to solve the disaster, but completely forgot about him. Her memory was stuck on the last moment before entering the debris, when they were arguing and she slammed the door. What she brought with her was her resentment towards her husband; what she chewed over and over in her thousand years of loneliness were every detail of the quarrel. She conquered the ultimate problem of the universe, but was forever trapped in the time loop of that family conflict. The last page of her research notes was filled with the same sentence: "I solved the formula of the universe, but I can't remember why I solved it." The wife was using her last remaining instinct to fulfill a promise she had forgotten. When they got married, he asked her: "If one day, you were required to spend your whole life solving a problem to save the world, would you do it?" She said: "If that is your world, I will." The key to saving the world was carved out of the four-dimensional void by a forgotten lover in endless loneliness with only an obsession carved into the soul.