At some point, we've all wondered how the world would end. With all the reports of strange events and sightings, the doom day may very well be tomorrow, next year, or it might take hundreds of years. Here are five of the most possible ways of how the world might end.

1. Alien invasion

The idea of the existence of aliens has been around for many years now. From sightings of UFOs to movies made on them, the idea is pretty popular. With water traces being found on Mars, the possibility of extraterrestrial creatures is heightened. Who's to say they won't come for us to take over our resources?

2. Flooding

Global warming is an increasing problem in the world. It's creating various extremities such as abnormalities in the weather. The warming is also melting the ice at the poles and low-lying areas. This ice is combing with the oceans to increase the water levels. If the global warming isn't stopped, all the ice will melt completely and the water from the oceans will flood many countries around the world.

3. World War III

The idea of another World War is not completely impossible considering current events around the world. Between the fight for resources, trade wars, rivalries and corruption, war is definitely a possibility. In the case of WWIII, we're all doomed for the nuclear weapons that are sure to be unleashed will wipe out countries.

4. Famines

With the population around the world increasing drastically every year, there is sure to be a food shortage in the future. With the limited water supply in many countries, farmers will have a tough time growing and harvesting crops, which will eventually cause massive famines. Famines in the past had caused many deaths and this time, due to the large population, many more people will die from hunger.

5. Diseases

Diseases, such as pneumonia and ebola, infected and killed millions of people in the past. These outbreaks will worsen and kill more people in the future due to the rapid pace it will spread by contact because of the population increase. Another deadly disease that can end the human race are skin cancers and disorders that will be caused due to the ruptures in the ozone layer. The ozone layer is reported to have holes about many countries. This causes the unfiltered UV rays from the sun to directly hit and affect humans.

6. Robots taking over the world

Since the introduction of robots, many have sided with them while others believed they were evil and will take over the world. Advancements in robot technology have given them the ability to move and even talk. Who knows, maybe robots will eventually want to take over us and rule the world in the future?

7. Death of the Sun

All of us know that the Sun will eventually die. It might take millions of years but it will run of its energy and explode, impacting all the planets near it. If the Sun dies out, life on Earth will not sustain for long. The Sun's energy will be so great when it dies, that it is quite possible that the Earth will also be seriously impacted.