On the backs of fish and many whales, which cuts through the waters surface . The beluga doesnt have one. This whale lives far to the north where its very cold and where, more often than not, this hardy white whale finds itself swimming under arctic ice sheets. Quite frankly, a dorsal fin would get in the way or worse, scraped up, or off. So no dorsal fin. But that doesnt mean that only this individual beluga whale doesnt have one and that this other beluga whale does. No, all beluga whales have adapted to have no dorsal fin. This is not something that they decided as individuals no matter how intelligent they might be. But its something that nature decided for them, in a manner of speaking. Physical adaptations during an animals life span but over many generations, and these changes to an animals body almost always result as a response to one of three things one, factors in the animals habitat, which is where it lives. These factors include adapting to the climate as in the case of ou
Captain Scott Mclaren here to discover discusses new press book. Captain mclaren is a graduate of the u. S. Naval Academy Class of 1955 and a veteran of more than 20 cold war commissions and three arctic expeditions. He was awarded the distinguished Service Medal and two legions of merit, as a cold war submarine commander. He was also president of the Polar Society and a former president of the explorers club. Hes the author of unknown waters. Firsthand account of the historic under ice survey by the Continental Shelf. He joins us today from his home in england colorado. [applause] thank you very much. When going to take you through is a hammered up combination of a variety of things. Maybe i had better concentrate on the book, but the very first part is taking you through of the highlights of my first book, the first survey of the entire Continental Shelf at the height of the cold war. When i finished talking about the book, if there is time i started diving the titanic. I was the fir
Williams. Good evening. It brought days of rain to arizona, ending right before the super bowl. It then caught a fast ride across the country, hit the midwest hard before arriving in the alreadypummelled sections of the east where tonight the pummelling goes on. More snow in boston and enough to delay the patriots celebration until wednesday after the snowiest sevenday period in that hearty citys history. Chicago and detroit fell just shy of alltime records in fact, and travel just took another big hit. These repeat winter storms make it feel a lot like groundhog day, which in fact it is. We begin with all of it tonight. Nbcs Miguel Almaguer starts us off from boston. Miguel, good evening. Reporter brian, good evening. Boston was hit with 14 hours of steady snow today. Its the reason why Public Schools have been canceled tomorrow and why the patriots parade has been pushed to wednesday. Were on boylston street. This is the parade route. And this is the problem. Snow mounds top six feet
Is nbc nightly news with brian williams. Good evening. It brought days of rain to arizona, ending right before the super bowl. It then caught a fast ride across the country, hit the midwest hard before arriving in the alreadypummelled sections of the east where tonight the pummelling goes on. More snow in boston and enough to delay the patriots celebration until wednesday after the snowiest sevenday period in that hearty citys history. Chicago and detroit fell just shy of alltime records in fact and travel just took another big hit. These repeat winter storms make it feel a lot like groundhog day, which in fact it is. We begin with all of it tonight. Nbcs Miguel Almaguer starts us off from boston. Miguel good evening. Reporter brian, good evening. Boston was hit with 14 hours of steady snow today. Its the reason why Public Schools have been canceled tomorrow and why the patriots parade has been pushed to wednesday. Were on boylston street. This is the parade route. And this is the prob
From nbc news World Headquarters in new york this is nbc nightly news. Reporting tonight, lester holt. Good evening. With the grief still palpable in this country over the death of a young arizona Woman Held Captive by isis president obama today asked congress to authorize the use of force against the terror group. The request at first glance may seem academic given that u. S. Warplanes have been pounding isis targets since last summer. But the president s request for a threeyear campaign against isis carefully spells out what the fight will and will not look like including under what circumstances american boots will set foot in the combat zone. Senior White House Correspondent Chris Jansing joins us now with full details. Hello, chris. Reporter good evening, lester. The president s critics have been calling for this more authorization since the first fighter jets went up over iraq. But the november election that gave republicans control of both houses of congress had leaders in both