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. Scientists have developed a ground-breaking method for testing the quality of a sperm before it is used in IVF and increase the chances of conception. http://www.physorg.com/news151595395.html Medicine & Health Mon, 19 Jan 2009 13:51:13 EST news151595395 Climate researchers have shown that big volcanic eruptions over the past 450 years have temporarily cooled weather in the tropics -but suggest that such effects may have been masked in the 20th century by rising global temperatures. Their paper, which shows that higher latitudes can be even more sensitive to volcanism, appears in the current issue of Nature Geoscience. http://www.physorg.com/news150397996.html Space & Earth Mon, 05 Jan 2009 17:13:16 EST news150397996