How will the world end?

Question: How will the world end?
- Keywords:
  apocalypse,
  end of the world
Asked by to Daren, Lynne, Phillip, Simon on 21 Jun 2014. This question was also asked by , .
- anon answered on 21 Jun 2014:
  
  In about 5.4 billion years the sun will run out of fuel (hydrogen) and will start to get hotter and expand. It will get so hot that all the water on earth will evaporate through the atmosphere. Without water there will be no more life on earth so that’s when life will end on earth. Eventually the sun will expand so much that it will eat up the earth!
- Daren Fearon answered on 22 Jun 2014:
  
  If we knew exactly how, we might be able to stop it! The sun is slowly expanding and becoming brighter, eventually it will collapse. Some scientists believe that the Earth will be destroyed in this process as it will be engulfed by the sun. However, some scientists believe that as the sun expands, it will lose mass and it’s gravitational tug over Earth will weaken, meaning the Earths will drift outwards and it will avoid being engulfed by the sun. Alternatively, the Earth might be destroyed by an asteroid before any of this happens.

Question: How will the world end?