Steve Green, a former NASCAR driver and a self-proclaimed innovator and problem-solver, has the solution to all of America's energy problems: Just tap into the geothermal power of Yellowstone National Park, and damn the consequences.

Luxury train service to Yellowstone National Park and other Western landmarks was spiked before it launched, as billionaire Philip Anschutz pulled the plug on the American Railway Explorer project, set to launch in 2011.

The numbers are in: the number of people who visited Yellowstone National Park in the month of July came close to equaling the number of people who came during the first six months of the year combined.

Thinking about an upcoming visit to Yellowstone National Park? Consider going on the weekend of Aug. 14-15, when the National Park Service is waiving admission fees to America's Oldest National Park.

The folks at the Montana Fish, Wildlife and Parks Department say they're investigating allegations that a photographer was baiting wildlife at the Soda Butte Campground with food in recent weeks, leading them to wonder if that's why a grizzly mother went on a rampage there last week, killing one and mauling two others.

More bear news from the Greater Yellowstone Ecosystem, this time from the Park itself: an overly aggressive black bear was euthanized yesterday by the National Park Service, who ruled out live capture and relocation as options to deal with a bear that had not gone after humans -- only their food. 

The autopsy is in on the mother grizzly who killed one and mauled two last week at Soda Butte Campgound in Cooke City just outside Yellowstone National Park, and the results are pretty dull: she was a little light but otherwise healthy, as experts continue to examine the results of a necropsy to determine whether something physical led the bear to go on the rampage.

The last interview with the late Jim Cole, the author who championed Yellowstone National Park grizzlies despite a mauling that left him disfigured, will be aired tonight on Yellowstone Public Radio.

The three cub bears associated with a deadly killing in Soda Butte Campground just outside the Northeast Entrance to Yellowstone National Park were undernourished and still in their winter coats, according to officials in ZooMontana, providing a crucial clue to why a mother grizzly may have gone on a rampage.

For the authorities, putting down a killer grizzly responsible for a Soda Butte Campground rampage was a no-brainer: any time a bear kills euthanasia is virtually automatic. But a surprising number of Internet commentators wanted to see the bear live -- though, as one official pointed out, the farther away they are from Cooke City the more likely they are to argue for clemency.