At this time of year, bears get very territorial over food sources as they are preparing for hibernation. Earlier this week, three grizzlies in Yellowstone got into a three-hour food fight of sorts, as they battled over a the carcass of a bull elk.
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DIARIES FROM THE ROAD: In this exclusive series, Simon Veness and Susan Veness share diaries of their travels by RV as they take on the ultimate US adventure. In part three, they take a deep dive into one of the country’s best-loved national parks, straddling Wyoming, Montana and Idaho
Scientists can determine the sources of hydrothermal fluids in park rivers by monitoring water chemistry. The result? A “budget” of which geyser basins release the most hydrothermal fluids.