http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- Princeton University scientists have shown that, in ancient times, the Earth's magnetic field was structured like the two-pole model of today, suggesting that the methods geoscientists use to reconstruct the geography of early land masses on the globe are accurate. The findings may lead to a better understanding of historical continental movement, which relates to changes in climate. http://www.physorg.com/news173712133.html Space & Earth Fri, 02 Oct 2009 15:30:02 EST news173712133 (PhysOrg.com) -- Not much is known about the Earth before 4 billion years ago, the earliest period in the planet`s 4.5-billion-year history. Because Earth has lost almost all geological records of this era from its surface, it`s often considered the planet`s dark ages. http://www.physorg.com/news147960214.html Space & Earth Mon, 08 Dec 2008 12:03:34 EST news147960214