http://phys.org/ en-us Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- New research by a team of British Earth scientists shows that while the Earth’s crust was made up of new material for much of its early life, it later began to recycle material three billion years ago, leading to the development of the continents we know today. The research team came to this conclusion, as they report in their paper published in Science, after studying oxygen isotopes in zircon samples taken from several different points across the globe. http://phys.org/news251109416.html Space & Earth Fri, 16 Mar 2012 10:24:29 EST news251109416