Yellowstone: report reveals extent of climate threat to oldest US national park

Researchers say temperatures, already the highest in the past 20,000 years, could increase by up to 10F by 2100

Yellowstone, established in 1872, is famous around the globe for good reason: it's the oldest national park in the United States and one of the most popular.

But a new report issued this week shows how Yellowstone's near pristine environment, with attractions like the Old Faithful geyser and herds of bison, is under threat from global heating.