A few years ago I remember watching this special on the discovery channel entitled Ten Ways the World Will End. It listed ten different doomsday scenarios which could end all life on earth.
| The Earth will spin off its axis | |
| Super-intelligent killer mutants | |
| A monster plague | |
| The war to end all wars | |
| Invasion of the Grey goo (molecular nanotechnology) | |
| The big freeze | |
| Alien invasion | |
| A super volcano | |
| Robots will inherit the Earth | |
| The Doomsday asteroid |
Some of them may seem a little ridiculous but others could be very real possibilities like the asteroid one, even though the odds are that it is unlikely in our lifetime.
It never hurts to prepare ourselves in case something ever happened, we don't want to end up like the dinosaurs.
Here are some more extraterrestrial dangers from wikipedia.
- It would seem that our galaxy, the milky way, is in a collision course with the Andromeda galaxy. This will only happen in 3 billion years however.
- In 5 billion years our sun will become a red star and in will become 10 more luminous.
- Our universe may come to an end, some scientist call this the Big Crunch. This will not happen for a considerable amount of time
- Massive objects such as a planet, a star or a black hole could be catastrophic if there was a close encounter with our solar system.
- Gamma Ray burst
http://en.wikipedia.org/wiki/End_of_civilization
Here is some interesting images I found on asteroid impacts.
http://concise.britannica.com/ebc/art-75278/Artists-concept-of-a-catastrophic-asteroid-impact-with-early-Earth
http://www.bertsgeschiedenissite.nl/geschiedenis%20aarde/komeetinslag.html
http://www.daviddarling.info/encyclopedia/P/potentially_hazardous_asteroid.html
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