In the Sierra Nevada mountains, the Donner Party's tragic tale is revisited with the recent uncovering of artifacts, including glass shards and a writing slate, preserved in ice since the infamous 1846 expedition. In Greenland, a Viking warrior's remarkably preserved body found in melting permafrost challenges our understanding of Viking exploration in the Arctic. The phenomenon of deep-sea gigantism is explored, debunking old theories about size adaptation in the ocean's depths. A Greenland tsunami triggered by a glacier collapse highlights the dangers of a rapidly warming Arctic.