Originally posted by FabianFnas
Why do you think that?
Maybe he thinks we (the earth) ends up like mars, smaller, no or little magnetic field left? All weel and gud but we won't get smaller, our expanded technological prowess will allow us to keep the field going forever. Like a 40,000 Km diameter coil (around the earth's equator)
fed with a few terawatts of room temperature superconducting energy
generates a field more than enough to keep the earths' field going.
We don't get smaller, but why would you think that anyway?
And it wouldn't happen in 10,000 years, more like 3 BILLION years.
Its been going strong for almost 5 billion years now and it aint slowing down THAT fast! We would have a lot more problems than the earth's magnetic field to worry about in that time frame, like the sun bulking up in size to almost include the earth in its outer atmosphere, THAT is a problem that would kill us long before the lack of magnetic fields would. But if you are postulating a concept where the earth keeps getting smaller for some reason, the land would get smaller and you would get smaller seems to me to be a wash. I thought the earth was smaller a billion years ago than it is now because of the the expansion of the universe but it was pointed out in an article of cosmological myths that the earth stays the same size but the whole universe would get smaller around it, the solar system would not change an inch. So how is this shrinking effect supposed to come about?