Volcanic eruptions in Guatemala captured in time-lapse video
Volcan de Fuego sent ash over a mile into the sky.
Author Archives: BBC News - Science & Environment
Polar bears captured on collar cams
High-tech tracking collars on polar bears reveal a growing Arctic struggle, say scientists.
Polar bears ‘running out of food’
Tracking collars on female polar bears measure the animals' struggle to find food on diminishing Arctic ice.