Mystery in Yellowstone

In the heart of America's most iconic wilderness, a mysterious force is wreaking havoc on Yellowstone National Park's delicate ecosystem. What was once home to 19,000 elk now boasts just 2,700, as researchers scramble to unravel the science behind this staggering decline. As they investigate a range of potential culprits - from wolves to trees to trout - one question remains: what's killing the park's wildlife?