adplus-dvertising
Connect with us

Science

Nanaimo Astronomy Society’s guest speaker will share the thrill of meteorite hunting

Published

 on

If it falls from the sky, Nanaimo Astronomy Society’s next guest speaker is eager to hunt it down.

Murray Paulson, an optical and electrical engineer, has a passion for hunting down and documenting meteorites that end up on Earth after travelling through the Solar System.

In his bio, Murray wrote that he has lived in lucky times, citing the Buzzard Coulee meteorite fall over Saskatchewan in 2008 and the discovery of the Whitecourt meteorite crater in Alberta in 2007. Working those sites, he said, changed his life.

Paulson has worked in the high-tech industry, designing and building lasers and related equipment most of his life. Along with meteorites, he’s had a lifelong passion for radios, building crystal sets when he was a kid and collecting them. He also contributes to the annual Royal Astronomical Society of Canada Observers Handbook.

“I’ve been hunting for meteorites, probably, since the mid ’90s,” Paulson said. “I was finally successful in 2008 when Buzzard Coulee fell. It was bountiful. It was fabulous. It was the most amazing time. My wife and I would go out in the spring after the snow went away. We’d take our trailer out to a plot of land we’d got permission to hunt on and we’d spend the whole weekend there.”

Paulson would bring out people to join in the search for meteorite fragments, walking 10 abreast in “police line type of searches” across a pasture of about 1.6 square kilometres over a period of about two months.

“It was a blast. Every day we were finding a handful of meteorites each and the nice part was that I’d negotiated with the owner that we could buy out the meteorites,” he said. “We got to keep half of them, but if we only found one or two, well, we also got a good price on what we could buy them out for. It was really cool. Everybody enjoyed themselves and everybody went home with a meteorite of their own at the end of it.”

The Buzzard Coulee meteorite is a stony composition chondrite type, which formed in space about 4.5 billion years ago.

“Very shortly after the Solar System condensed and things started cooling down, that’s when this stuff started forming and the clock has been ticking ever since,” he said. “We can see the radioactive decay of components in it and date these meteorites.”

Meteorites, Paulson said, lose about 95 per cent of their mass on their way down through the atmosphere because they “burn like crazy.”

“They’re doing Mach 30 and they’re literally, probably, at 4,000 degrees centigrade,” he said. “They burn up and about 30 kilometres off the ground the atmosphere is dense enough that it stops the forward progress and the meteors usually break up.”

Higher-density iron meteorites can make it all the way to the ground and hit with tremendous energy. Paulson said the iron Whitecourt meteorite – estimated to have weighed about five tonnes – struck with a velocity of about 11 kilometres per second, stopped moving in about eight metres, bounced and shattered, distributing fragments around an impact depression created about 1,100 years ago. His team of hunters mapped the debris field and recorded the weights and measures of more than 3,500 specimens.

Paulson said people have found an estimated 4,000 to 5,000 meteorite specimens around the crater and those who search those sites today might still have a good chance of finding meteorite fragments. But meteorite hunting does require patience to produce the reward of a find.

“I’ve told people meteorite hunting is fun, but it’s a lot more fun finding them,” he said.

Paulson’s presentation, ‘Exploring the Solar System’s Fossils,’ will be made online via Zoom on Thursday, March 23, at 7 p.m. To learn more about the Nanaimo Astronomy Society and how to join the meeting, visit www.nanaimoastronomy.com.

728x90x4

Source link

Continue Reading

Science

‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

Published

 on

 

It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

B.C. sets up a panel on bear deaths, will review conservation officer training

Published

 on

 

VICTORIA – The British Columbia government is partnering with a bear welfare group to reduce the number of bears being euthanized in the province.

Nicholas Scapillati, executive director of Grizzly Bear Foundation, said Monday that it comes after months-long discussions with the province on how to protect bears, with the goal to give the animals a “better and second chance at life in the wild.”

Scapillati said what’s exciting about the project is that the government is open to working with outside experts and the public.

“So, they’ll be working through Indigenous knowledge and scientific understanding, bringing in the latest techniques and training expertise from leading experts,” he said in an interview.

B.C. government data show conservation officers destroyed 603 black bears and 23 grizzly bears in 2023, while 154 black bears were killed by officers in the first six months of this year.

Scapillati said the group will publish a report with recommendations by next spring, while an independent oversight committee will be set up to review all bear encounters with conservation officers to provide advice to the government.

Environment Minister George Heyman said in a statement that they are looking for new ways to ensure conservation officers “have the trust of the communities they serve,” and the panel will make recommendations to enhance officer training and improve policies.

Lesley Fox, with the wildlife protection group The Fur-Bearers, said they’ve been calling for such a committee for decades.

“This move demonstrates the government is listening,” said Fox. “I suspect, because of the impending election, their listening skills are potentially a little sharper than they normally are.”

Fox said the partnership came from “a place of long frustration” as provincial conservation officers kill more than 500 black bears every year on average, and the public is “no longer tolerating this kind of approach.”

“I think that the conservation officer service and the B.C. government are aware they need to change, and certainly the public has been asking for it,” said Fox.

Fox said there’s a lot of optimism about the new partnership, but, as with any government, there will likely be a lot of red tape to get through.

“I think speed is going to be important, whether or not the committee has the ability to make change and make change relatively quickly without having to study an issue to death, ” said Fox.

This report by The Canadian Press was first published Sept. 9, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending