According to various models, the world could end in any of a number of ways:

• Nuclear war
• Ice age
• Super supervolcano
• Massive extinction of biosphere-critical species
• Galaxy supernova ejecting all protons
• Solar system smashed into black hole
• Cambrian explosion II
• Decay of the vacuum induced by protons on the edge of the event horizon
• Burning ghost solar system
• Extreme parton fusion in the 10 TeV region
• Fatally damaging freeze on the free neutrons in the dibaryon in the resonance transition
• All mammals moved to the men’s room
• Slippery slope that leads to a slippery slope to a slippery slope
• Impact of a strangelet
• Apocalyptic engine failure
• Semantic satiation
• Creation of hyperdense E8 vacuum bubble
• First autocatalytic bacterial thermodynamic planet
• They take offense to being called ‘the three stars.’
• Superconducting life forms would then try to infect us with their atoms
• Water world
• Drift in starship crew culture
• Octanium dominates as a cooling agent for superconductors
• Orgone energy blows past limit of Yudkowsky novel
• We were going to write about the end of the world, and then we forgot that we were going to write about the end of the world.