tonight a look at what we're calling the new denmark and what we might learn from its experience. late last year "worldfocus" special correspondent john larson went to denmark to have an extensive look at its energy revolution. we begin with how denmark has reduced its dependence on oil and created thousands of new jobs. >> reporter: perhaps denmark's most famous landmark, the little mermaid, looks toward the sea in this country's maritime past. but if these tourists came to see a symbol of the new denmark, they're looking in the wrong direction. clean, renewable wind power is arguably the new symbol of denmark, now a world leader in alternative energy. in denmark, you'll find the world's most efficient power plants running increasingly on biomass from fields, forests, even garbage. >> thousands of degrees inside the furnace. >> reporter: but the story of how denmark has changed the way it uses energy is best told at home. most mornings, lizbeth ebbinghouse leaves her husband and two children and commutes to work on her bicycle, a four-mile trip. >> and now we're halfway. whew! >>

they tracked rates of siriasis in denmark for an entire decade. and some surprising news that of a study from greece. marathon runners might be at an increased risk for heart disease. regular marathon runners have higher blood pressure and stiffer aortas. they liken the affect of high- intensity exercise on the heart to a sports car. rev it up too much, and it could burn out. it affects male marathoners only. women were not included in the study. what does a vasectomy have to do with march madness? oddly enough, urologists have observed that the number of scheduled vasectomy increases by 50% the week march madness begins. if you're going to get it done anyway, this is the perfect time. it is a phenomenon that doctors have been noticing for several years. a 50% jump. >> we will see a low start early thursday morning, and a lot of those guys are already ready, icing down and ready for a good weekend. >> 24 to 48 hours with an ice pack. then there's a similar jump just before the super bowl, too. >> some breaking news. what is going on? >> this is just north of grand chop, a