Polar bears take some cajoling as pen pals. First you need to find one, then sedate it and quickly give it the necessary tools before it wakes up. It's an awkward first encounter -- how many friendships do you know that start with a tranquilizer dart? -- and admittedly a one-sided correspondence, but soon they're sending messages daily.


원문출처 : https://www.cnn.com/2020/12/09/europe/polar-bears-svalbard-jon-aars-norwegian-polar-institute-spc-intl-c2e/index.html