I dunno, I think somehow somethings going to blockout the sun, so we get like a second ice age.
Either that or blackholes.

Mm I remember that one site with all the end of the world scenarios. I liked the one where we boil like hot dogs and become a second venus.

global warming starts f***ing up weather even more, and some nuclear bomb causes hell to break loose in most of the known world.

Ice caps melt, Northern hemispheres (Europe) go back into Ice age since ice caps melting kills off Gulf Stream.

World doesnt end as such, but much of what we have done goes back to the drawing board.

China become more powerful, West weakens, Russia stay the same more of less.

Austrailia still pwns.

if(getThingFlags(source) & 0x8){
  do her}
elseif(getThingFlags(source) & 0x4){
  do other babe}
else{
  do a dude}

The earth ending in terms of everyone and civilization coming to an end? Or the planet itself ending?

Well, the end of the planet earth probably would be the sun. After few billions of years, the water on earth would be gone and after that, the sun's size would increase and overcome the planet. I don't think we have to worry about "something blocking the sun," whatever that means, or blackholes...

Proof?

Nuclear war to (mostly) wipe out humanity and the sun to take out the planet.

I liked the nanobots one. Grey sludge was it?

In the future, the Matrix will be regarded as canon for real life history.

Jet engine falls into my bedroom.

YES

A new ice age is just a matter of time, unless something like earth blowing up happens before that...anyway, won't an ice age just start things over (everything dies but there's still water, only frozen, and then it melts and new life emerges), only the planet won't get any younger?

Meh... Most likely a war of some sort will end the world.

Well see , first I am going to make a deadly beam ray that can enslave the Earth...

Supervolcanoes, Ice Ages and Asteroids/Meteors seem to be them more likely natural disasters. We're overdue the first two and we keep having a lot of near-misses with the third.

Pah.... the Death Star... someone will build one, then George Lucas will sue.

Massassi will go down forever causing a massive influx of the nerd community entering the public... we will breed with the normals women and eventually the diffrences between us will vanish and the human race will be destroyed.

"Game Over"

I think global warming is as undeniable as global cooling. It's just arrogant to believe that man causes it. And how could global warming or cooling "f" up the weather when it is the weather? meh.

Anyway, so what's the question, end of the Earth or life on it?

Probably just after the young sourcerer traps all the gods in a magic sphere, which looses the great Ice Jiants upon the face of the Disc, err, I mean, Earth. They will race out Rimwards, err, I mean south from the poles and cover the Disc, err, I mean Earth, in a thick layer of ice.

That is, of course, all assuming that the four Horsemen of the Apocralypse, err, I mean Apocalypse, dont get wasted at some bar along the way and have their horses stolen...

this one?

The world will end when I die.

This way.

More? You know, earth's population is now at more than 6 billion. That is far, far more than earth's population 100 or 200 years ago. That is adding a lot of carbon dioxide to the air. The rise of carbon dioxide leaves have (not so coincidentally) risen with the rise with the rise in population. That is adding a lot of carbon dioxide to the air. That's not two mention two major volcano eruptions in the last 100 years. Also when you consider that a small "ice age" ended a 150 years ago, I would expect temperatures to still be on the rise a bit anyway. Furthermore many man-made pollutants actually have cooling effect of earth's temperature. Earth's temperature rises over loooong periods of time. A slight rise in temperature over 50 years in not something to get excited over. Write back when the temperature has actually rises significantly.

Just some poorly assembled raw data.

We do need to cut down on pollution some big cities, but that's only a localized effect.

CFCs destroy Ozone at a rate far beyond anything natural and won't be banned internationally until 2010.

Carbon Dioxide concentrations are expected to be at almost double their natural level within the next decade or so.

There is no doubt that we are putting a heck of a lot of pollutants in the atmosphere, the doubt is whether we are causing any changes signficantly beyond what would occur naturally.

I can't recall any scientists saying we had an ice age 150 years ago, 150,000 maybe.

Only if you believe that fictional crap they put in the bible.

You people are strange. Everyone knows that the only viable answer is Vogons.

Yes, Vogons. A Vogon Constructor Fleet will elimate the planet to make way for a new hyperspace bypass.

In a whisper.

A true World War, which will likely end with a nuclear apocalypse.

I remember reading somewhere in various articles that scientists are saying that in about a billion years from now, the sun will swell up and start to expand, engulfing the earth. So yeah, that would be the end of it.

However, this is granted that earth even survives from now until then...

I think due to the stupidity of humanity the most likely scenario for the world ending (and I believe it's about 98% of happening) would be a nuclear war or another war of some sorts. Humanity is destructive by nature.

Give a knife to a 3 year old, he's going to cut himself.

That or a large asteroid hitting the earth.

The population of stupid people will continue to increase, smothering out the intelligent people which hold the keys to any useful future. Thus, production and development of anything complex will cease, putting an end to new electronics and such, and nuclear facilities will explode because the stupid people thought they new what they were doing there. The population's IQ will continue to dwindle, causing us to lack the knowledge of basic reproductive functions, ultimately leading to the extinction of the human race.

The end.

But as long as we have Bruce Willis, that's not really an issue. :p

No.....What we really need.....is a Death Star.

I have a theory... The Mayans said the world will end in 2012. What is 2012? An election year. That's right. 2008 is going to be an uneventful, boring presidency. This sets the stage perfectly for a Martha Stewart/Oprah Winfrey ticket.

Now, this combination will cause just about every female in the country to flock to the voting booths and vote, and they'll beat up their husbands and it'll be a landslide victory.

And then.. Oprah will get depressed. She's going to have to leave her show to someone else, so it'll become "The Oprah Winfrey Show Hosted by Regis Fillmen" or something, and it'll suck. (Not like it doesn't already, but you know..) So then she'll start eating again and get bigger than she's ever gotten before.

She'll eat, and eat, and eat, and eat (and Martha is just going to make her more food and prettier food and so she'll keep eating and getting larger). Anyway, soon after Oprah will have eaten so much food, all of the added mass, plus her current mass, will be great enough to significantly alter the orbit of the moon around the Earth, effecting the tides causing regular tsunamis all around the world, earthquakes, and landslides, until the moon finally collides with the earth, destroying all life as we know it.

The Happydud Theory of Destruction.

/me bows

George W. Bush will make a wild accusation that the Chinese are terrorists and will start launching liberating nucular devices... to... free... the Chinese people.

Detritic is right.

Climate change occurs naturally, so the real problem here is discerning what effects are being caused by human activity and what is being caused by natural processes.

As with everything in science, there are varying degrees of uncertainty about things. But some things we know to be quite certain. Firstly, human activities are changing the composition of Earth's atmosphere. Increasing levels of carbon dioxide for the last 200 years have been well documented and there is no doubt that this is due to human acitivies.
It is also known that carbon dioxide and other gasses effectively 'warm' the planet. Human activity is strengthening the natural 'greenhouse effect'.

Now, to what degree human activity is affecting the Earth is what is uncertain. There is a natural carbon dioxide cycle. It will rise and fall naturally. The actual amount that human activity emits is very very small, compared to natural factors such as volcanoes and trees and the like. The difference is that the Earth's atmosphere as evolved with this over millions of years, and the atmosphere can handle volcanic eruptions and other natural effects, because they too have been happening for millions of years. Human activity has only really been significant over the last 200 years, and the problem is that we are bumping up the carbon dioxide levels above that of which the atmosphere is used to. Even if it's only a tiny amount, it's still tipping the balance.

What is uncertain is how much the atmosphere can take before it affects the Earth significantly.
As this is a global problem, it requires a global solution, so it's quite sensible that the UN has been at the heart of this. The UN set up the Inter-governmental Panel on Climate Change, IPCC, to investigate how much is due to human activity. The IPCC has already noted that various trends are "unlikely to be entirely natural in origin". In the most recent Third Assessment Report (2001), IPCC wrote "There is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities.".

Many politicans take the view 'okay we don't know, let's wait until things are more certain'. The problem is that by then it's too late to do anything about it.

What doesn't help is the media leaping on this and trying to make it far more sensationalist than it actually is, suggesting that recent weather phenomena are the result of global warming. We cannot know this, there is no way that we can try and make this link, and it's this sort of nonsense that makes people doubt the effect of global warming as a whole. It is important and it is something to be worried about... but not quite as much as the media like to make out.

Global warming will blow up the planet:
http://nujournal.net/core.pdf


Human industrial activity makes biospheric collapse inevitable.
http://www.foundation.bw/TheEndOfTheWorld.htm


Failure to achieve space travel dooms us to extinction.
http://www.gene.ch/gentech/2001/Nov/msg00059.html

When it comes to knowing how are planet's climate works we only venture to predict what local weather will be like in a week, and a lot of the time we're wrong. So what makes you think that we, as a human race, have enough scientific knowledge to predict how the climate of the entire Earth will change over a period of years?

Edit: And here's a good site about global warming.

Because studying the Earth's climate is nothing at all like studying local weather. In many cases, it's much easier to study the whole Earth, or very large chunks of it.