And in about a bazillion years, Earth will no longer have a moon. What will the atomic clock keepers blame it on then?
It doesn't matter anyway, the sun is continually expanding. In another 100,000 years we'll have to all move to Mars to escape the heat. Didn't you guys all notice when you were in school that the Ice Ages have been getting progressively shorter?
Of course, that's still long-term for humanity. Most species don't live past 100,000 years, we're close to that now.
In the very short term we have to worry about global warming. The fact is that warm periods come and go fast, even though they do last for millions of years.
You know how they come so fast? Methane is building up underneath the seafloor near the UK. One quake and vast amounts of methane, a global warming agent, will be released into the atmosphere, rising temperatures throughout the globe.
The air temperature isn't what we should be worried about, it's the ocean temps. If the oceans rise 5 degrees F, you can expect the sea levels to rise by over 100 feet, wiping out the vast majority of large cities in the world.
Yeah, it's not the size of the ice caps that determine how high the sea levels are, it's the temperature of the water.
Edit: And oh yeah, even if we escape the expanding sun and everything else like asteroids, our galaxy is doomed to colide with our nieghbor. I think it's coming relatively soon too.
Nah, just looked it up, 5 billion years