Weather

The sheriff’s office said one of the men called his wife in Arizona and asked her to call for help, but the group still continued up the snowy trail.

The rate of temperature rises in the last 50 years is the highest in 2,000 years, and concentrations of carbon dioxide are the highest in at least 2 million years.

Nearly five feet of snow fell this winter in West Yellowstone, resulting in giant berms created by snowplows along Highway 191, according to the Buffalo Field Campaign.

Nature photographer Mathew Nichols just spent a few chilly nights in the woods of northwestern Washington documenting the surreal formation of "hair ice," which can be found when conditions are just right in the winter.