Penguins, Seals, and Krill: Antarctica’s fragile food chain

- Source: CNN " data-fave-thumbnails="{"big": { "uri": "https://media.cnn.com/api/v1/images/stellar/prod/180608111109-protecting-antarctica-cropped-vr.jpg?q=x_1033,y_477,h_1190,w_2115,c_crop/h_540,w_960" }, "small": { "uri": "https://media.cnn.com/api/v1/images/stellar/prod/180608111109-protecting-antarctica-cropped-vr.jpg?q=x_1033,y_477,h_1190,w_2115,c_crop/h_540,w_960" } }" data-vr-video="true" data-show-html="" data-byline-html="" data-timestamp-html="" data-check-event-based-preview="" data-is-vertical-video-embed="false" data-network-id="" data-publish-date="" data-video-section="" data-canonical-url="" data-branding-key="" data-video-slug="Protecting Antarctica VR" data-first-publish-slug="Protecting Antarctica VR" data-video-tags="" data-details="">