http://www.washingtonpost.com/wp-dyn/nation/science?nav=rss_nation/scienceScienceen-us1514020http://www.washingtonpost.comhttp://media.washingtonpost.com/wp-srv/hp/image/wp_web.gifhttp://www.washingtonpost.com/wp-dyn/articles/A10769-2005Apr22.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A10769-2005Apr22.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT The Today Sponge contraceptive is returning to the market after a decade as federal regulators approved it again yesterday.]]>http://www.washingtonpost.com/wp-dyn/articles/A8000-2005Apr21.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A8000-2005Apr21.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMThttp://www.washingtonpost.com/wp-dyn/articles/A6040-2005Apr20.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A6040-2005Apr20.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Guy Gugliottahttp://www.washingtonpost.com/wp-dyn/articles/A6016-2005Apr20.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A6016-2005Apr20.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMTTwo very large studies have reached the disappointing conclusion that regularly taking antibiotics does not prevent heart disease, as some scientists had hoped.]]>http://www.washingtonpost.com/wp-dyn/articles/A64109-2005Apr18.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A64109-2005Apr18.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Guy Gugliottahttp://www.washingtonpost.com/wp-dyn/articles/A63919-2005Apr18.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A63919-2005Apr18.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMThttp://www.washingtonpost.com/wp-dyn/articles/A64134-2005Apr18.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A64134-2005Apr18.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMTPeople who are happy may be better able to avoid debilitating health problems, a study by British researchers shows.]]>http://www.washingtonpost.com/wp-dyn/articles/A61017-2005Apr17.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A61017-2005Apr17.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Rick Weisshttp://www.washingtonpost.com/wp-dyn/articles/A61018-2005Apr17.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A61018-2005Apr17.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMTSo why is it that whenever you make popcorn there are always unpopped kernels left at the bottom of the bowl or the bag at the movies -- the ones that stick in your throat, plug up your teeth and pop your fillings?]]>http://www.washingtonpost.com/wp-dyn/articles/A59524-2005Apr16.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A59524-2005Apr16.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMThttp://www.washingtonpost.com/wp-dyn/articles/A45041-2005Apr11.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A45041-2005Apr11.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Guy Gugliottahttp://www.washingtonpost.com/wp-dyn/articles/A51363-2005Apr13.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A51363-2005Apr13.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Aricept, a drug long used to treat Alzheimer's disease, can delay its onset a bit but does not prevent it in people with mild cognitive impairment, U.S. researchers said yesterday.]]>http://www.washingtonpost.com/wp-dyn/articles/A45025-2005Apr11.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A45025-2005Apr11.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Rick Weisshttp://www.washingtonpost.com/wp-dyn/articles/A44897-2005Apr11.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A44897-2005Apr11.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMTLow-fat diets might be fine for adults, but at least one small study suggests grown-ups using that approach for their families could be depriving young children of vitamins.]]>http://www.washingtonpost.com/wp-dyn/articles/A42189-2005Apr10.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A42189-2005Apr10.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Cheryl Lyn Dybashttp://www.washingtonpost.com/wp-dyn/articles/A42425-2005Apr10.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A42425-2005Apr10.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Galileo Galilee, the Italian physicist, astronomer and mathematician, may have unintentionally cribbed one of his greatest insights from a countryman who had been dead 300 years: the poet Dante Alighieri.]]>http://www.washingtonpost.com/wp-dyn/articles/A38306-2005Apr8.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A38306-2005Apr8.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Guy Gugliottahttp://www.washingtonpost.com/wp-dyn/articles/A32376-2005Apr6.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A32376-2005Apr6.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Rick Weisshttp://www.washingtonpost.com/wp-dyn/articles/A35311-2005Apr7.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A35311-2005Apr7.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMTContaminated Roma tomatoes were the probable cause of a string of salmonella outbreaks that made 561 people sick in the United States and Canada last summer, U.S. health officials said yesterday.]]>http://www.washingtonpost.com/wp-dyn/articles/A23500-2005Apr3.html?nav=rss_nation/sciencehttp://www.washingtonpost.com/wp-dyn/articles/A23500-2005Apr3.html?nav=rss_nation/scienceSun, 1 May 2005 10:01:08 GMT Guy Gugliotta