'Polar bears are using 60% more energy than expected to catch seals. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world\'s premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what\'s possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Some are using more energy than they consume. Four of nine bears in the study lost 10% or more of their body mass in an 8-to-11-day period. The bears need sea ice to hunt seals that make up more than 95% of their diet. But sea ice is decreasing by 14% each decade due to global warming. This means bears must travel further and further to find seals. Researchers placed point-of-view cameras on the bears to track them in their dire search for food. As the sea ice continues to fragment the bears\' ratio of energy expenditure to consumption will grow. Read more in \"Polar Bears Really Are Starving Because of Global Warming, Study Shows\" https://bit.ly/2YUkNsh POV Footage Shows Polar Bears Struggling to Find Food | National Geographic https://youtu.be/MSzEiIbIik8 National Geographic https://www.youtube.com/natgeo'
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