Canada wildfires spread and merge as evacuations continue

Two fast-moving "extreme" wildfires merged overnight in western Canada, threatening hundreds more homes and forcing continued evacuations in a wide swath of British Columbia province, officials said Sunday.

From aerial photograph to precise snow depth

You don't always need a laser—sometimes a camera will do. Researchers at the WSL Institute for Snow and Avalanche Research (SLF) have now disproved the paradigm that the height of snowpack can only be accurately determined ...

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