classifies what we humans are: mammals. tracy smith will be reporting our cover story. reporter: they re idolized, netishized, idealized, stylized. men love to stair at breasts. i have to say i don t find this revolutionary science. reporter: they might also be lethal. they are the most vulnerable organ to cancer in a woman s body. reporter: later on sunday morning, the art and science of breasts. hey, my eyes are up here. osgood: a bird s eye view is what seth doane will be offering from one of the world s most extraordinary cities. reporter: 18 million tourists visit venice each year taking in its historic beauty, but one of the biggest draws of all might surprise you. pigeons. thousands of them. of all of the things you ve done in venice, where does this rank? the top. reporter: later on sunday morning, the pigeons of saint mark s square. osgood: after the storm a really terrible one, a community is left to mourn its dead, comfort its injured and honor
mammals. tracy smith will be reporting our cover story. reporter: they re idolized, netishized, idealized, stylized. men love to stair at breasts. i have to say i don t find this revolutionary science. reporter: they might also be lethal. they are the most vulnerable organ to cancer in a woman s body. reporter: later on sunday morning, the art and science of breasts. hey, my eyes are up here. osgood: a bird s eye view is what seth doane will be offering from one of the world s most extraordinary cities. reporter: 18 million tourists visit venice each year taking in its historic beauty, but one of the biggest draws of all might surprise you. pigeons. thousands of them. of all of the things you ve done in venice, where does this rank? the top. reporter: later on sunday morning, the pigeons of saint mark s square. osgood: after the storm a really terrible one, a community is left to mourn its dead, comfort its injured and honor its heroes. you never know how