What caused the Yellowstone hydrothermal explosion?
While the explosion was considered small, it unleashed "a massive amount of rocks and dirt" that shattered a fence and killed nearby trees.
Yellowstone National Park
Hydrothermal explosion closes off Yellowstone National Park's Biscuit Basin
The hydrothermal explosion at Yellowstone took place near Biscuit Basin's Sapphire Pool on Tuesday morning, erupting boiling water and steam into the air, officials said.
Yellowstone blast sends water, rocks flying
Yellowstone tourists were sent running after a small hydrothermal explosion sent boiling water, steam and debris flying over a boardwalk in the national park's Biscuit Basin. The explosion, which occurred near Sapphire Pool just north of Old Faithful, destroyed the fence along the boardwalk.
Man picking berries in Montana kills grizzly bear in self-defense
A 72-year-old man killed a grizzly bear in Flathead County, Montana after it attacked him while he was out picking berries.
Car runs off the road and into thermal geyser at Yellowstone
Five people were driving Thursday morning near a semi-centennial geyser thermal pool when it went off the road.
Armed suspect dies after shootout with rangers at Yellowstone National Park
A person with a gun who authorities said was making threats in Yellowstone National Park died after a shootout with park rangers, officials said in a statement.
Suspect dead after shooting at Yellowstone
A suspect died and a park ranger was injured in a shooting at Yellowstone National Park on Thursday, the National Park Service said. Rangers responded to a report of a man with a gun who was making threats, according to the agency.
Yellowstone staff confirm birth of rare white bison calf
The reported birth of a rare white buffalo fulfills a Lakota prophecy that portends better times, according to members of the American Indian tribe.
Huge section of Wyoming highway collapses, blocking critical route
A huge section of the Wyoming mountain highway Teton Pass collapsed in a landslide Saturday. Officials said it will be closed indefinitely.
Bison gores 83-year-old woman in Yellowstone National Park
An 83-year-old South Carolina woman suffered serious injuries when a bison in Yellowstone National Park lifted her about a foot in the air with its horns.
Injured man arrested for kicking bison at Yellowstone
Clarence Yoder was charged with being under the influence of alcohol, disorderly conduct, and approaching and disturbing wildlife.
Pierce Brosnan fined for walking off trail in Yellowstone thermal area
Actor Pierce Brosnan, who was fined $500 for stepping off a Yellowstone National Park thermal area trail, was caught after posting pictures online, court records said.
"Geological hazards" lurking below Yellowstone National Park, data show
New imaging technology has allowed geologists to see the bare earth, and its potential red flags, around Yellowstone like never before.
Rare, deadly "zombie" deer disease found in Yellowstone, officials say
This marks the first confirmed case of chronic wasting disease in Yellowstone National Park, officials said.
Montana park partially closed over search for bear that mauled hunter
In recent weeks, a number of aggressive encounters between humans and grizzly bears in Montana have been reported.
Montana Indian reservation works to revive bison populations
Over the last 20 years, the Fort Peck Indian Reservation has seen its bison herd grow to about 800.
Traps removed after no sign of grizzly bear that killed woman near Yellowstone
Officials ruled out a rare predatory attack, which suggests the marathon runner died following a chance bear encounter while likely running or walking.
Woman possibly killed by grizzly bear near Yellowstone National Park
Investigators discovered grizzly bear tracks near the woman's body on Buttermilk Trail, close to the park.
Nature: Bison in Yellowstone
We leave you this Sunday morning in Yellowstone National Park. Videographer: Brad Markel
Bison charges at, gores woman at Yellowstone National Park
Bison are unpredictable and can run three times faster than humans. They can be dangerous when approached, according to the National Park Service.
Yellowstone tourists took a baby elk for a ride in their car, officials say
"Some actions by visitors have led to the endangerment of people and wildlife and resulted in the death of wildlife," the park said.
Man pleads guilty to disturbing baby bison that had to be euthanized
While park officials said there was no indication that the man acted maliciously, his actions led to the baby bison's death.
Baby bison killed after man "disturbed" the animal in Yellowstone
Law enforcement at the park have opened an investigation into the incident.
Rangers find a dead woman in car at Yellowstone National Park
The car had been driven into a snowbank, and when rangers arrived at the scene they saw a man standing outside the car, authorities said.
Grizzly bear found dead near Yellowstone prompts investigation
A grizzly bear that appeared to have been killed was found near Yellowstone National Park, prompting an investigation from state and federal officials.
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