Watch Nora the polar bear cub through her nearly first two years of life. Nora was born in a zoo on Nov. 5, 2015. At six days old, her mother left their den and didn't come back. Columbus Zoo keepers made the decision to raise her.

For more about Nora the polar, read 'The Loneliest Polar Bear" at The Oregonian/OregonLive: https://projects.oregonlive.com/proje...