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) -- Based on studies of old volcanic basalt, scientists know that the Earth`s magnetic field reverses at irregular intervals, ranging from tens of thousands to millions of years. Volcanic basalt rock contains magnetite, and when the rock cools, its magnetic properties are frozen, recording the Earth's magnetic field of the time. With this data, scientists estimate that the last magnetic field reversal occurred about 780,000 years ago. http://www.physorg.com/news159704651.html Physics Thu, 23 Apr 2009 11:24:39 EST news159704651 (PhysOrg.com) -- Many bacteria are able to 'swim' through liquids by means of a flagellum. When doing this, some bacteria follow attractants, some flee from harmful substances, and others align themselves using light, gravity, or magnetic fields. These processes may also play a role in infections. Following a swimming bacterium without influencing its motion is difficult. Nanotechnology researchers are also interested in determining the motion of nanoparticles, which would be useful for the development of nanomotors, for example. http://www.physorg.com/news156176926.html Chemistry Fri, 13 Mar 2009 15:39:59 EST news156176926 (PhysOrg.com) -- Scientists appear to have the rock-solid evidence that suggests carbon dioxide can be safely and permanently sequestered in deep, underground basalt rock formations, without risk of it eventually escaping to the atmosphere. The findings have potential implications for sequestering carbon in other reservoir systems as well. http://www.physorg.com/news146158855.html Space & Earth Mon, 17 Nov 2008 15:40:55 EST news146158855