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For first time, researchers scale General Sherman, world's largest tree, in search of new threat to sequoias

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For first time, researchers scale General Sherman, world's largest tree, in search of new threat to sequoias
  • Researchers climbed General Sherman, the world’s largest tree, for the first time ever and gave it a clean bill of health.
  • The researchers were looking for bark beetles, which have become more dangerous to giant sequoia trees in combination with extreme heat, drought and wildfires.
  • In 2020 and 2021, record-setting wildfires killed as much as 20 percent of the world’s 75,000 mature sequoias.

High in the evergreen canopy of General Sherman, the world’s largest tree, researchers searched for evidence of an emerging threat to giant sequoias: bark beetles.

The climbers descended the towering 2,200-year-old tree with good news on Tuesday.

“The General Sherman tree is doing fine right now,” said Anthony Ambrose, executive director of the Ancient Forest Society, who led the expedition. “It seems to be a very healthy tree that’s able to fend off any beetle attack.”

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It was the first time climbers had scaled the iconic 275-foot sequoia tree, which draws tourists from around the world to Sequoia National Park.

Giant sequoias, the Earth’s largest living things, have survived for thousands of years in California’s western Sierra Nevada range, the only place where the species is native.

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But as the climate grows hotter and drier, giant sequoias previously thought to be almost indestructible are increasingly threatened by extreme heat, drought and wildfires.

A researcher climbs General Sherman, the world’s largest tree, in Sequoia National Park, California, on May 21, 2024. The research team inspected the 275-foot tree for evidence of bark beetles, an emerging threat to giant sequoias. (AP Photo/Terry Chea)

In 2020 and 2021, record-setting wildfires killed as much as 20 percent of the world’s 75,000 mature sequoias, according to park officials.

“The most significant threat to giant sequoias is climate-driven wildfires,” said Ben Blom, director of stewardship and restoration at Save the Redwoods League. “But we certainly don’t want to be caught by surprise by a new threat, which is why we’re studying these beetles now.”

But researchers are growing more worried about bark beetles, which didn’t pose a serious threat in the past.

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The beetles are native to California and have co-existed with sequoias for thousands of years. But only recently have they been able to kill the trees. Scientists say they recently discovered about 40 sequoia trees that have died from beetle infestations, mostly within the national parks.

“We’re documenting some trees that are actually dying from kind of a combination of drought and fire that have weakened them to a point where they’re not able to defend themselves from the beetle attack,” Ambrose said.

The beetles attack the trees from the canopy, boring into branches and working their way down the trunk. If left unchecked, the tiny beetles can kill a tree within six months.

That’s why park officials allowed Ambrose and his colleagues to climb General Sherman. They conducted the tree health inspection as journalists and visitors watched them pull themselves up ropes dangling from the canopy. They examined the branches and trunk, looking for the tiny holes that indicate beetle activity.

But it’s not possible to climb every sequoia tree to directly inspect the canopy in person. That’s why they’re also testing whether drones equipped with sensors and aided by satellite imagery can be used to monitor and detect beetle infestations on a larger scale within the forests.

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Tuesday’s health inspection of General Sherman was organized by the Giant Sequoia Lands Coalition, a group of government agencies, Native tribes and environmental groups. They hope to establish a health monitoring program for the towering trees.

If they discover beetle infestations, officials say, they could try to combat the attacks by spraying water, removing branches or using chemical treatments.

Bark beetles have ravaged pine and fir forests throughout the Western United States in recent years, but they previously didn’t pose a threat to giant sequoias, which can live 3,000 years.

“They have really withstood insect attacks for a lot of years. So why now? Why are we seeing this change?” said Clay Jordan, superintendent for Sequoia and Kings Canyon National Parks. “There’s a lot that we need to learn in order to ensure good stewardship of these trees for a long time.”

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Idaho

Today in History: May 2, carbon monoxide from Idaho mine fire kills 91

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Today in History: May 2, carbon monoxide from Idaho mine fire kills 91


Today is Saturday, May 2, the 122nd day of 2026. There are 243 days left in the year.

Today in history:

On May 2, 1972, a fire at the Sunshine silver mine in Kellogg, Idaho, claimed the lives of 91 miners who succumbed to carbon monoxide poisoning.

Also on this date:

In 1863, during the Civil War, Confederate Gen. Thomas “Stonewall” Jackson was accidentally wounded by his own men at Chancellorsville, Virginia; he died eight days later.



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Montana

Providers travel to bring specialty care to Montana communities

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Providers travel to bring specialty care to Montana communities


For many Montanans living in rural communities, accessing specialized healthcare isn’t as simple as booking an appointment. It can mean hours on the road to cities like Great Falls. But a growing outreach effort from health care like Benefis Health System is changing that reality by bringing providers directly to patients.

Brianna Juneau reports – watch the video here:

Providers travel to bring specialty care to Montana communities

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Instead of requiring long-distance travel, Benefis doctors and advanced practice providers are hitting the road, delivering care in towns across North Central Montana. The goal: reduce barriers to access and ensure patients receive timely treatment closer to home.

“In this geographic area, sometimes some of the more medically complex children are seen by pediatricians,” said pediatrician Rachel Amthor. “It can be an opportunity to try to reach some children with medical complexity who do live in a rural area.”

That access can be especially impactful for young patients. In some communities, clinics are located near schools, allowing children to attend appointments without missing an entire day of class.

“There’s very much a community atmosphere with the clinic,” Amthor said. “I’ll have some patients walk from school during the day to come to their checkup and then walk back. They don’t have to miss a lot of school because everything is so close.”

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But for many adults, particularly those working in agriculture, traveling for care can be a major obstacle.

“They either have to arrange transportation or they don’t drive at all—it’s an ordeal,” said Elizabeth O’Connor, a cardiothoracic nurse practitioner. “Some of our patients travel for a whole day to get here and back, or they have to spend the night. A lot of farmers and ranchers just can’t leave their property for that long.”

By bringing services into rural towns, providers can catch health issues earlier and make critical adjustments before conditions worsen.

“We’re able to make some simple adjustments in their medications that may prevent heart attacks, strokes, heart failure, admissions,” O’Connor said. “Providing access can certainly improve—if not longevity—the quality of their life.”

Benefis’ outreach clinics now serve a wide range of communities, offering specialty care that would otherwise require travel:

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Choteau: Cardiology, OBGYN, Podiatry, Pediatrics

Fort Benton: Pediatrics, Cardiology, Podiatry, Dietician/Nutrition services, Diabetes Education, Functional Medicine and Hormone Replacement Therapy

Conrad: Cardiology

Cut Bank: Women’s Health

Havre: Nephrology and Neurology

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Rocky Boy: Women’s Health and Nephrology

Shelby: Orthopedics

White Sulphur Springs: Women’s health

Lewistown: Orthopedics and Dermatology

Browning: Nephrology

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Many of these services are critical for managing chronic conditions, ranging from heart disease to kidney disorders, where consistent follow-up care can significantly impact outcomes.

For providers like Amthor, the outreach effort is deeply personal.

“I became a pediatrician because I wanted to treat kids in underserved areas,” she said. “I was not expecting to be working in rural Montana, but that has been different and very good.”

As the program continues to grow, Benefis leaders say they hope to expand services even further, reaching more communities and reducing healthcare disparities across the state.

In places where distance has long defined access, these traveling clinics are helping ensure that quality care is no longer out of reach, but right down the road.

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Nevada

Nevada Immigrant Coalition rallies in downtown Las Vegas on May Day to demand worker protections

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Nevada Immigrant Coalition rallies in downtown Las Vegas on May Day to demand worker protections


LAS VEGAS (KTNV) — The Nevada Immigrant Coalition held a march and rally in downtown Las Vegas on May Day, joining similar demonstrations across the country to demand better treatment for immigrant families and workers.

The event coincided with First Friday, drawing attention to the economic pressures facing local businesses and workers as costs continue to rise.

Noe’ Orozco, a representative with the Nevada Immigrant Coalition, said the group is focused on elevating people over corporations.

WATCH | Nevada Immigrant Coalition rallies on May Day to demand worker protections

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Nevada Immigrant Coalition rallies on May Day to demand worker protections

“We’re trying to put people above corporations, and we one way. You can do that is definitely by supporting the local businesses, because a lot of the local businesses, they, they sustain themselves,” Orozco said.

Many local business owners and workers say they rely on the foot traffic that First Friday generates each month.

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“It’s our one night a month that we get walking traffic as if we’re on Fremont Street or on the Strip,” said a business owner at First Friday.

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Workers also described the financial strain of the current economy.

“It’s very difficult to be living in the economy now without having two jobs,” said another business owner at First Friday.

The coalition said it is also responding to a recent surge in immigration enforcement activity across Nevada, which it says is negatively affecting local families.

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Nevada Immigrant Coalition rallies on May Day to demand worker protections

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“Since the start of last year, we’ve seen a lot more of those overlapping conversations happening. And so, as I mentioned, right, highlighting the workers’ rights and a lot of those workers, a lot of workers that we engage with our migrant or immigrant workers, immigrant families, and so regardless of what industry you’re looking at, there is going to be an immigrant household that is being impacted,” Orozco said.

Do you have a story you’d like to share with Shellye? Contact her at Shellye.Leggett@ktnv.com, or by clicking on the banner below.

Do you have a question or news tip for Channel 13 reporter Shellye Leggett? Reach out to her here!

This story was reported on-air by a journalist and has been converted to this platform with the assistance of AI. Our editorial team verifies all reporting on all platforms for fairness and accuracy.





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