The world, meaning life as we know it on Earth, is predicted by scientists to have an approximate expiration date about 1 billion years from now due to the depletion of oxygen caused by the increasing heat of the aging sun. This will make the Earth's atmosphere unbreathable for complex life forms. Ultimately, the Earth itself is expected to be destroyed or absorbed by the sun as it expands into a red giant in around 7.5 to 7.6 billion years from now. So, the "end of the world" in terms of habitability is far in the future, not imminent by any near-term human scales.

There is also the symbolic Doomsday Clock maintained by the Bulletin of the Atomic Scientists to represent how close humanity is to a global catastrophe, currently at 90 seconds to midnight due to climate change, nuclear risks, and conflicts, but this is more about existential risk than planetary destruction.

In summary:

• Complex life on Earth is predicted to be unsustainable in about 1 billion years due to oxygen depletion.
• The physical Earth may be destroyed when the sun becomes a red giant in about 7.5 billion years.
• Near-term "end of the world" scenarios are speculative and far from these astronomical timelines.