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. Our cells are more like us than we may think. They're sensitive to their environment, poking and prodding deliberately at their surroundings with hand-like feelers and chemical signals as they decide whether and where to move. Such caution serves us well but has vexed engineers who seek to create synthetic tissue, heart valves, implants and other devices that the human body will accept. http://www.physorg.com/news180202451.html Biology Wed, 16 Dec 2009 16:17:58 EST news180202451 Soil researchers pay close attention to bulk density, as it is one of the most common soil measurements and it is often used as a measure of soil quality. A soil's bulk density can be indicative of the ease of root penetration, water movement, and soil strength. Measuring this value with traditional methods has been difficult in the past, but researchers have developed a new method using laser scanning technology. http://www.physorg.com/news147530769.html Space & Earth Wed, 03 Dec 2008 12:46:09 EST news147530769