are beginning to be very different than they ve been over their evolutionary past. reporter: data from the last five decades confirms females are 11% smaller, males 23% smaller. when the seminal movie dances with wolves was released 32 years ago, ranchers feared that troubling trend had already started. bison are definitely a more wild animal than cattle. reporter: rancher jeremy gingrich says those brown grasses reflect national weather service data. for the last 22 years where the buffalo roam has fluctuated from abnormally dry to exceptional drought. what concerns me when i see the dry ranges are we going to have enough grass to maintain the bison herd through the summer. reporter: a rancher s goal is straightforward. big animals, big herd. here their meat, low in fat, high in iron, ends up at one of
expected to shop this weekend, a wave of brazen and sometimes violent smash and grab robberies could drive some shoppers away from stores. delivery by drone, our exclusive look at how the nation s largess customers. powerful windship potential wildfire danger in the west, while a possible snowstorm could mess up holiday travel in the east. we go where the buffalo roam, to show you how one native american tribe is trying to save these symbols of freedom. and unifying america, how the seedkeepers of philadelphia are helping people connect with their roots. this is the cbs evening news with norah o donnell. dokoupil: good evening, and thank you for joining us on this thanksgiving. hope you re having a happy one, i m tony dokoupil in for norah. for the second year in a row, americans are expressing gratitude in the midst of a pandemic.
0 reward. a good day in law enforcement. thank you for watching at captioning sponsored by cbs dokoupil: tonight, the s captioning sponsored by cbs dokoupil: tonight, the second thanksgiving of the pandemic, covid cases and deaths continue to rise, but this year americans are on the move in numbers not seen since before the coronavirus. more than 50 million americans are expected to travel over the holiday weekend, a pandemic record of 2.3 million travelers checked into u.s. flights at airports on thanksgiving eve alone. could the travel surge become a superspreader? the commander-in-chief marks the first thanksgiving of his presidency, giving thanks to u.s. troops. thankful for these guys. dokoupil: plus what we re learning about the president s health. the holiday shopping season begins with retailers ready to ring up record sales, while millions of americans are expected to shop this weekend, a wave of brazen and sometimes violent smash and grab robberies could drive som
a smart way to wash your hands. some people have joint pain, plus have high blood pressure. they may not be able to take just anything for pain. that s why doctors recommend tylenol®. it won t raise blood pressure the way that advil® aleve® or motrin® sometimes can. for trusted relief, trust tylenol®. brennan: on tomorrow s cbs evening news, we go where the buffalo roam to show you how a native american tribe is working to save these magnificent creatures. if you can t watch us live, don t forget to set your dvr so you can watch us later. that is tonight s cbs evening news. for norah o donnell, i m