In the face of deadly heat, will mankind respond to climate change in time?

Visitors to one of Yellowstone National Park's most popular sites saw a bison take its final steps into a hot spring, where it died.

The bison died in the boiling waters of the Grand Prismatic Spring. This happens from time to time, but usually not in front ...

Though early in the morning — the bison fell in just a few minutes before 7 a.m. — there were ample witnesses who took pictures, video and wrote about what they saw on social media.