I recently talked with a young geologist, some of whose field work is in the Arctic. We mostly talked about the science, but the geologist mentioned being certified (not sure of this word) to act as a ...
For hiking in polar bear country, this answer cites a page that advices to avoid camping under the stars at all times. Yet people do go trekking on Svalbard, and I don't think the density of huts is ...
Some animals are big and dangerous and, when hungry, may realise that humans contain a pretty decent amount of meat. I've never hiked in such areas, but they do exist. Photo from Wikipedia, CC-BY-...